Answer:
C) Lysosome.
Explanation:
Lysosomes are the membrane-enclosed small vesicles formed from the Golgi apparatus. The lysosomes contain enzymes like RNAase, DNAase, protease and other enzymes which can digest the biomolecules and maintains the pH at 5.0.
The acidic environment and the digestive enzymes help lysosomes digest the foreign material and the cellular debris.
In the given question, since the cell is not able to digest the bacteria and its components therefore the affected organ is the lysosomes.
Thus, Option-C is the correct answer.
Darla smoked heavily during the entire 9 months of her pregnancy. Her newborn baby will most likely be a. underweight.b. autisticc. hyperactived. hearing impaired
Answer:
The correct answer is - a. underweight.
Explanation:
Smoking is advised to quit before pregnancy so new born could be risk free of health issue caused by smoking. The major pregnancy risks of the smoking heavily during pregnancy for new born babies are preterm birth, cleft birth defects.
The heavily entire 9 month smoking leads to underweight baby due to various reason including preterm birth. SIDS is also one of the risks of the smoking even after the pregnancy.
Thus, the correct answer is - a. underweight.
Resistance to pesticides a. is an example of gene flow. b. arises by genetic drift. c. is the result of long-term changes in the pesticide. e. e. e. is independent of the selection coefficient. none of the above
Answer:
none of the above
Explanation:
Resistance to pesticide is caused by genetic mutation. Genetic mutation is an altercation of the Deoxyribonucleic acid sequence that forms the basis of a gene.
When pesticides are introduced to these insects, only those who survived are resistant to the pesticides, the population reduces but yet creating some variant in the gene(allele) over time.
One effect of a mutation, is to create another variant of a gene. When this happens, you have increased the variability of a population, and changed allele frequency. Therefore, there is likelihood that those resistant to the pesticides increase and thrive over time.
Which of the five kingdoms in Whittaker’s phylogenetic tree are prokaryotic, and which are eukaryotic?
Answer:
Most kingdoms are Eukaryotic
Explanation:
Prokaryotes are organisms consisting of cells that do not have membrane-bound organelles or a cell nucleus.
Eukaryotes are organisms made up of cells that have a membrane-bound nucleus to hold their genetic material, in addition to membrane-bound organelles.
The five kingdoms are Animalia, Plantae, Protista, Fungi, and Monera.
Animalia are eukaryotic because the organisms in this category are advanced organisms that require membrane-bound organelles and a nucleus with their genetic DNA in order to function and thrive. Protista, fungi, and plantae also go into the eukaryotic category because protists, fungi, and plants all have membrane-bound organelles and can carry out higher-level functions.
Monera are prokaryotes, and monera are usually classified into two domains: bacteria and archaea. Monerans lack a nucleus and membrane-bound organelles, and for this reason Monerans are very small organisms.
According to the five-kingdom classification of R.H Whittaker, the kingdom Monera is a unicellular prokaryotic organism, while the other four kingdoms i.e. Protista, Fungi, Plantae, and Animalis are the eukaryotic organisms.
How prokaryotes are different from eukaryotes?Prokaryotes don't have a well-defined nucleus and other membrane-bounded cell organelles while eukaryotes possess proper compartmentalization.
Therefore, it is well described above.
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Which of the following statements correctly describes intermediate filaments? a. They are the only cytoskeletal filaments that are not composed of protein. b. Intermediate filaments are the principal component of the cell cortex. c. These filaments are always found outside of the cell. d. These filaments help the cell to withstand mechanical stress. e. None of the above answers are correct
Answer: d. These filaments help the cell to withstand mechanical stress.
Explanation:
Intermediate filaments are the rope like fibers. These filaments form an extensive network ranging from the nucleus to the plasma membrane thus these filaments entirely cover the cytoplasma of the cell. These are developed from the cytoskeletal proteins. They have a diameter that is intermediate between thick and thin myofibrils. The diameter of the myofibril is in between 10 to 12 nm. They stabilize the nucleus. The main function of the intermediate filaments is to provide mechanical strength to the cells that will help them to withstand stress during stretching, elongation and changing shape.
The correct statement about intermediate filaments is option d. These filaments help the cell to withstand mechanical stress. They are part of the cytoskeleton that gives the cell its shape and provides strength.
Explanation:Intermediate filaments are an essential part of the cell's cytoskeleton, which provides the cell with shape, strength, and the ability to withstand mechanical stress. Therefore, the statement d. These filaments help the cell to withstand mechanical stress is correct. Intermediate filaments are different from the other cytoskeletal components, microfilaments and microtubules, in being composed of several different proteins, which explains their varying diameters (hence, 'intermediate'). They are found within the cell, not outside of it, and unlike the other components of the cytoskeleton, they are not involved in cell movement.
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A man and woman marry. They have five children, 2 girls and 3 boys. The mother is a carrier of
hemophilia, an X-linked disorder. She passes the gene on to two of the boys who died in childhood
and one of the daughters is also a carrier. Both daughters marry men without hemophilia and have 3
children (2 boys and a girl). The carrier daughter has one son with hemophilia. One of the non-carrier
daughter’s sons marries a woman who is a carrier and they have twin daughters. What is the percent
chance that each daughter will also be a carrier?
Answer:
50%
Explanation:
Since the disease is X-linked, males can either be affected or not while females can be affected, unaffected or a carrier for the disease.
Let the allele for hemophilia be h, the alternate will be H
Non-carrier mother's son is a not affected for the disease = [tex]X^H Y[/tex]
A woman who is a carrier = [tex]X^H X^h[/tex]
If the two mate: [tex]X^H Y[/tex] x [tex]X^H X^h[/tex]
Progeny: [tex]X^HX^H, X^HX^h, X^HY and X^hY[/tex]
Out of the two daughters, one is a carrier and the other is unaffected at all.
Hence, the chance of each daughter being a carrier is 50% or 1/2.
The motion of lipid molecules in a synthetic bilayer can be studied by various techniques. Which of the following has been observed in these systems?
A. Phospholipids diffuse rapidly within and between the two leaflets of a bilayer.
B. An average lipid molecule can diffuse the length of about 2 micrometers in a fraction of a millisecond.
C .Flip-flops are very rare for phospholipids.
D. Within a bilayer, lipid molecules rarely rotate about their long axis, but diffuse laterally at very high rates.
E. All of the above
Answer:
Option C . Flip-flops are very rare for phospholipids.
Explanation:
Flip-flop means that movement of phospholipds upside down. This phenomenon occur in cell membrane but very rarely. I have attached a picture for you to under stand how flip-flopping occurred.
The food from stomach empties into the ___. a. colon b. esophagus c. duodenum of the small intestine d. ileum of the small intestine
Answer:c. duodenum of the small intestine
Explanation:
The digestive system is a series of hollow organs joined in a long, twisting tube from the mouth to the anus Inside this tube is a lining called the mucosa. In the mouth, stomach, and small intestine, the mucosa contains tiny glands that produce juices to help digest food.
Two solid organs, the liver and the pancreas, produce digestive juices that reach the intestine through small tubes. In addition, parts of other organ systems (for instance, nerves and blood) play a major role in the digestive system.
The food from the stomach empties into the duodenum of the small intestine. Therefore, the correct answer is option c.
The food from the stomach empties into the duodenum of the small intestine.
Digestion of food begins in the mouth.The chewed and softened food passes through the esophagus after being swallowed.The smooth muscles of the esophagus undergo peristalsis that pushes the food toward the stomach.The food enters the stomach where it is further broken down by stomach acid and enzymes.After the initial breakdown in the stomach, the food empties into the duodenum of the small intestine.Therefore, the correct answer is option c.
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"In order to have reached this conclusion, the Grants must have either assumed or proven that several other facts about the finch population were true. Which statements represent information that must be true in order for the Grants conclusion to be correct
Note:
Question is incomplete I have added the full question at the end of this answer.
Answer:
All these below statements are in parallel with the research publication published in 2006 about darwin's work. Furthermore, Darwin proved that beak evolution occurred at Galapagos island.
Correct Options are
1. Beak size varies among the birds in the finch population under study.
2. Birds that could eat larger, tougher seeds survived and reproduced during the drought.
3. Beak size is an inherited trait in the finch population under study.
Reference:
Grant, Peter R., and B. Rosemary Grant. "Evolution of character displacement in Darwin's finches." science 313.5784 (2006): 224-226.
FULL QUESTION
"Population thinking" is essential to the idea of natural selection. Rather than thinking of populations or species as sets of mostly identical individuals, Darwin and Wallace understood that a great deal of heritable variation occurs among individuals within populations. Which example best illustrates this idea?
"Population thinking" is essential to the idea of natural selection. Rather than thinking of populations or species as sets of mostly identical individuals, Darwin and Wallace understood that a great deal of heritable variation occurs among individuals within populations. Which example best illustrates this idea?
Giraffes have longer necks than zebras.
You have a different eye color than your classmate.
Soybeans have a higher protein content than corn.
You have a different haircut than your classmate.
You have a different eye color than your classmate.
How did the drought lead to an increase in beak size in the medium ground finch population? The Grants reasoned that
prior to the drought, the finch population fed primarily on small seeds that they could open easily. Although larger, tougher seeds were available, they were not typically eaten, not even by finches with larger beaks.
during the drought, only a limited number of small seeds were produced, leaving mostly larger, tougher seeds available for food. Finches that were unable to eat the larger seeds died of starvation.
Based on their observations and the data they collected, the Grants concluded that evolution by natural selection had occurred in the medium ground finch population. The increase in the average beak size of the offspring was a direct result of the change in the food supply during the drought.
In order to have reached this conclusion, the Grants must have either assumed or proven that several other facts about the finch population were true. Which statements represent information that must be true in order for the Grants conclusion to be correct?
Select the three statements that must be true.
Select the three statements that must be true.
An individual finch's beak size can change depending on the size of the seeds it eats.
Beak size varies among the birds in the finch population under study.
Birds that could eat larger, tougher seeds survived and reproduced during the drought.
Beak size is an inherited trait in the finch population under study.
The drought caused a mutation that led to larger beak sizes in the finch population.
Which three statements may correctly explain why the population size increases after time point C?Figure:Point C is a point in a graph
The correct statements are:
The population grew more rapidly after time point C because the bacteria must have acquired a second drug-resistance mutation.The population increase just after time point C indicates that antibiotic use was discontinued.Bacteria that acquired a mutation conferring drug resistance had a growth advantage over non-resistant bacteria, leading to the rapid reproduction of drug-resistant bacteria and a subsequent increase in the overall population size.The statement that the population grew more rapidly after time point C due to the acquisition of a second drug-resistance mutation is not necessarily supported by the graph. The increased population size may be attributed to other factors, such as the growth advantage of existing drug-resistant bacteria.The population increase just after time point C does not necessarily indicate that antibiotic use was discontinued. It could be a result of the proliferation of bacteria with drug resistance, indicating that the antibiotic was not effective against these resistant strains.The plausible explanation for the population increase after time point C is that bacteria with a mutation conferring drug resistance had a growth advantage over non-resistant bacteria. This growth advantage led to the rapid reproduction of drug-resistant bacteria, contributing to the overall population expansion. This interpretation aligns with the principles of natural selection, where advantageous traits confer a fitness advantage and drive their prevalence in a population.Suppose an organism (2n) has a haploid number of n=6. How many chromatids would be present at prophase of mitosis?
Answer:
24
Explanation:
An organism with n=6 chromosomes would have the diploid chromosome number 2n= 12 in its somatic cells. The process of DNA replication during the S phase of interphase doubles the DNA content. This newly formed DNA is accommodated in the sister chromatids of chromosomes. Therefore, after the S phase, each chromosome has two sister chromatids.
The prophase cells have clearly visible chromosomes due to the compaction of chromatin. Each of the prophase chromosomes has two sister chromatids. Therefore, the total number of chromatids in prophase cell of the given organism would be 12 x 2 = 24.
The blueprints for structural organization and metabolism are contained in ____, and the offspring receive copies of these instructions ___.a. DNA; through metabolism b. DNA; from the parent c. RNA; are generated by chanced. DNA; are generated by chance e. RNA; from the parent
Answer: Option b: DNA; from the parent
Explanation: Chromosomes are present in pairs which contains DNA. When sperm and egg are United to create a child, one strand of DNA comes from mother and one from the father. It means you receive one copy of chromosome from father and one from the mother and DNA present in double stranded form, so two copies of each Gene are present. Your chromosome that is formed is unique to both parents because you receive chromosome from both. The chromosome contain DNA, stores information for inheritance of features from parents to next generation and from the DNA, protein is formed by using it's information. Actually DNA contains nitrogenous bases which forms the codes for the formation of amino acids that are building block of proteins.
3. Mammals feed their young with insects, plants, and roots.
a. True
b. False
Beatrice and Allen Gardner taught the chimpanzee Washoe to communicate by means of:A) pictures.B) Morse code.C) sign language.D) a simplified typewriter
Answer:
The correct answer is - option C) sign language.
Explanation:
Washoe was a chimpanzee used in a research experiment. According to Beatrice and Allen Gardner, this chimpanzee is the first non-human to learn and communicative with the help of American sign language. Washoe learned about 350 signs of ASL, an American sign language. It was part of the research experiment on animals.
Thus, the correct answer is - optic C.
Modification of these cells would not affect the genetic make-up of one’s children_________.
Answer:
Somatic cells
Explanation:
Alteration done to somatic cells would impact that person's body only—and cannot be inherited.
On the other side, germline cells are procreative cells that can produce embryos. Therefore, any alterations to this ones will be hereditary.
Somatic genetic modification alters the genes in order to provide solution to a medical condition.
Gametes, or sex cells, are produced out of germ cells, while somatic cells are all the cells except sex cells. A mutation that affecsts the germ cells, its termed a germline mutation.
Modification of somatic cells would not affect the genetic make-up of one’s children
Question 10-1. Why is the Carnot cycle not a realistic model for steam power plants? Please select all corrected answers. Group of answer choices High moisture content in the turbine section Seeking higher thermal efficiencies using other power cycles. Limiting the heat transfer processes to two-phase systems.
Questions does not provide enough details therefore i have added full question with answer see attached picture.
Answer:
Carnot cycle is not a realistic model for steam power plant due to the following reasons:
1. Isentropically pumping two phase flow is not practical
2. High moisture content in the turbine section.
3. Limiting the heat transfer processes to two-phase systems.
A lion will sometimes eat a dead, found carcass if the lion is hungry and cannot find living prey. What ecological phenomenon is this an example of?
Answer: lion participate in one or more tropic level
Explanation:
Scavengers can occupy the highest trophic levels.
A scavenger is an animal that eats the dead bodies of animals it has not killed. In nature, there is not a clear dividing line between (Scavengers And Predators). Most carnivores, such as lions, hyenas, and coyotes, will opportunistically consume a carcass if they are hungry. Vultures, although primarily scavengers, will hunt sick or weakened prey. Consequently, these large flesh-eaters exist on two different trophic levels.
Scavenger species often interact at kill sites. More than one species may feed on the same carcass at different stages of decay, or may eat different parts of the carcass.
Answer: b
Explanation:
took the tes
Two or more related lineages acquire a similar characteristic which is not found in a common ancestor. What are the structures called?A. parallelB. homologousC. divergentD. analogousE. cladistic
Answer:
The correct option is D. analogous
Explanation:
We speak of an analogy when one structure is similar to another or has the same function, but whose embryonic development and its origin or ancestor is not common, they are different, in other words, they are analogous structures if they fulfill functions or acquire similar characteristics starting from the same medium, without requiring them to have the same evolutionary origin (they may or may not be similar structurally and embryologically).
Analogous structures are features in different organisms that are similar due to convergent evolution in similar environmental conditions, rather than from a common ancestor.
Explanation:When two or more related lineages acquire a similar characteristic that is not found in a common ancestor, the structures are called analogous structures. These features arise due to convergent evolution, where organisms evolve similar traits independently because of similar environmental pressures, not because they share a close evolutionary relationship. An example of analogous structures are the wings of bats and insects, which look similar because they both facilitate flight but developed independently in these lineages without a common ancestor with wings.
Find two other examples of compounds that biomagnify. Explain how each compound and/or toxin enters the biosphere and what impacts it has on living organisms in general and humans in particular.
Answer:
1. DDT (
Dichlorodiphenyltrichloroethane) with molecular formula; C14H9Cl5
2. Lead
Explanation:
1. DDT (Dichlorodiphenyltrichloroethane) is an example of compounds that biomagnifies in the biosphere. DDT is used as pesticides. When DDT is sprayed on plants to kill their pests, part of it is accumulated within the plants.
However, when primary consumers feeds on the affected plants, DDT is passed on to them and then to the secondary consumer in that sequence until it get to the top of the trophic level.
Effects of DDT have been seen in many organisms including birds and humans. The effects seen in humans is quite minimal to that of insects and birds. DDT causes lost of many insects and young birds. In humans, it causes vomiting, seizures etc.
2. Lead: it enters the biosphere by absorption and consumption means. Humans through the use of lead paint, smoking of cigarettes, use of cosmetics and combustion of coal accumulates lead in their bodies. Lead can't be synthesize by human, therefore it accumulates and biomagnify within their systems.
The effects of lead in human include; vomiting, stroke and abdominal pains. In tough scenario, it causes immune system deterioration and cardiovascular diseases.
Which of the following statements concerning the process of spontaneous folding of proteins is false?
1) It may be an essentially random process.
2) It may involve initial formation of local secondary structure.
3) It may involve initial formation of a highly compact state.
4) It may involve a gradually decreasing range of conformational species.
5) It may be defective in some human diseases.
Answer:
The correct answer is the number 1) It may be an essentially random process
Explanation:
Protein folding is a chemical process in which the structure of a protein assumes its functional configuration.
All protein molecules are heterogeneous, unbranched chains of amino acids. By folding and rolling to take a specific three-dimensional shape, proteins are able to perform their biological function.
The opposite process is called denaturation, in which an original protein is forced to lose its functional configuration, becoming an amorphous and non-functional chain of amino acids. Denatured proteins can lose their solubility and precipitate into insoluble solids. In some cases, the denaturation is reversible and the proteins may reenact. However, denaturation is, in most cases, an irreversible process.
In certain solutions and under certain conditions, proteins may not fold. Temperatures above or below the range in which cells usually survive, cause the protein to unfold or denature (this is why boiling causes the egg white to become opaque). High concentrations of solute and pH extremes can lead to the same result. A completely denatured protein has no tertiary and secondary structures, and exists under the designation of a random spiral. Cells sometimes protect their proteins from denaturation by heat thanks to enzymes known as companions or heat shock proteins, these help other proteins, both to fold and to stay folded. Some proteins never fold inside cells except with the help of accompanying molecules, which isolate individual proteins so that their folding is not interrupted by interactions with other proteins. The DNA configuration is maintained by another set of enzymes.
The statement concerning the process of spontaneous folding of proteins that is false is A. It may be an essentially random process.
Protein folding simply means the chemical process where the structure of a protein gets its functional configuration. The process of spontaneous folding of proteins can be may be defective in some human diseases.
The process of spontaneous folding of proteins may involve an initial formation of local secondary structure and an initial formation of a highly compact state.
In conclusion, the false statement is it can be an essentially random process.
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Suppose a diploid mosquito is completely heterozygous at all 6 of its chromosomes (2n = 6). How many different combinations of gametes can be produced by this mosquito, assuming no homologous recombination between chromosomes?
Answer:
8 different combinations of gametes can be produced by this mosquito, assuming no homologous recombination between chromosomes
Explanation:
The mosquito has 6 chromosomes. This means that means it has 3 pairs of homologous chromosomes. Basically, we can assume the number of different gametes by 2 to the power of 3 as their are 3 homologous pairs. This means 2×2×2 which will be equal to the amount of eight. Hence, eight different combination of gametes will be produced.
This mosquito can produce 64 different combinations of gametes.
Step 1
If a diploid mosquito is completely heterozygous at all 6 of its chromosomes (2n = 6), it means that each chromosome pair consists of two different alleles.
There are two potential alleles for every pair of chromosomes, and during gamete development, each allele can segregate independently. Thus, the number of alternative allele combinations for each pair of chromosomes determines the number of various combinations of gametes that this mosquito can produce.
Step 2
For each chromosome pair:
- There are 2 different alleles.
- Each allele can segregate independently during gamete formation.
So, for one chromosome pair, there are 2 possible combinations of gametes.
Step 3
Since there are six chromosomal pairs altogether, multiplying the number of combinations for each pair will yield the total number of possible gamete combinations:
[tex]\[2^6 = 64\][/tex]
Therefore, this mosquito can produce 64 different combinations of gametes.
In a variational process of evolution, as described by Darwin, the properties of a trait in a population change because:a.Each of the individuals in the population change in that trait.b.Some of the individuals in the population change their trait by a small amount and others by a large amount.c.Whether or not an individual in the population changes its trait varies depending on the environment where that individual lives.d.None of the individuals in the population change, rather which individuals remain in the population changes.
Answer:
Option (c).
Explanation:
Darwin is known as the father of evolution and explains the theory of the natural selection. He explains the relationship between the evolution and the natural selection.
According to Darwin the population with more reproductive power has high chance of fitness and adapt in the environment. This is because the large number of individual in the population shows large variation with the variation in the fitness when subjected to the process of natural selection. The changes or the variation in the trait mainly depends upon the environmental condition of the individual.
Thus, the correct answer is option (c).
Final answer:
The properties of traits in a population change not because individuals change their traits, but because natural selection (environment) changes which individuals survive and reproduce, altering the population's genetic composition over generations. So, option c is correct.
Explanation:
In a variational process of evolution, as described by Darwin, the properties of a trait in a population change because none of the individuals in the population change, rather which individuals remain in the population changes. This is due to natural selection, where traits that provide a survival and reproductive advantage become more common in the population over time. Evolution occurs due to changes in the genetic composition of a population over generations, resulting from differential reproduction of individuals with certain alleles. It is important to understand that evolution does not occur on the individual level, but across populations where the average value of a characteristic may change due to the presence of more advantageous traits within the breeding individuals.
Most mutations do not become widespread in a population because they lower an individual’s fitness. True or False?
Answer: True
Explanation:
Most of the mutation is not widespread because they cannot be transferred from one generation to another and moreover due to this reason they are not naturally selected.
These mutations makes the body of individual weaker and leads to the death of the organism.
If the organism dies how will it transfer the traits so is not favored by nature. This is against the fitness of the individual and the organism becomes weak.
Bacterial plasma (cell) membranes contain which two molecules in the greatest abundance? Choose one or more:
(A) lipopolysaccharides
(B) ribosomes.
(C) polysaccharides
(D) phospholipids
(E) proteins
(F) nucleic acids
Answer: Option D and E.
Bacterial cell membranes contain phospholipid and proteins.
Explanation:
Bacterial unicellular microorganisms. Bacteria cell membrane cover the whole body and it is a thin layer of about 8 nanometers thickness. The cell plasma membrane contain phospholipid and protein which serve as permeability barrier for molecules and aid in the transport of material in and out of the cell. The protein is the building block.
14. briefly outline why control of transcription is more complex in eukaryotes than in prokaryotes
Answer:
I have attached my slides in picture format explaining full process why control of transcription is more complex in eukaryotes than in prokaryotes with examples.
Which structure becomes the seed after fertilization? ovary anther ovule pollen
Answer:
Ovule becomes seed after fertilization and ovary becomes the fruit
How might water on the surface of the solid culture medium cause the disruption of colony formation?
Answer: There can be few reasons why surface on water can be harmful to the bacterial colony.
Explanation:
It is possible that while preparing the media for the bacterial colony that the constituents might not have been taken right proportion and water is more in it.
It tends to float on the surface and if the bacterial colony is not able to grow in such an environment it will led to the death of the colony.
There are chances that the mobility of the bacterial species increases in water and because of this there will be problems faced at the time of isolation.
An experimenter conducts an experiment on the effects of a drug to control hallucinations. he declares the results to be "statistically significant" which usually means that _________________.
Answer: the differences between experimental and control groups occur only by chance.
Explanation:
In an experiment, the result is said to be statistically significant or to have statistical significance, if it is likely not caused by chance for a given statistical significance level. So, if an experimenter conducts an experiment on the effects of a drug to control hallucinations. he declares the results to be "statistically significant" which usually means that the differences between experimental and control groups occur only by chance
Historically, an unusual aspect of the recent rise in CO2 levels is that Select one: a. there is no known mechanism for its occurrence. b. CO2 reacts so quickly with other compounds that it should not be occurring. c. it has occurred relatively slowly. d. it has occurred relatively rapidly.
Answer:
B. CO2 reacts so quickly with other compounds that it should not be occurring.
Explanation:
CO2 concentrations globally have increased significantly due to increased anthropogenic activities of burning, increased emissions from industrial hubs around the globe and other contributing human activities. Burning of fossil fuels, coal and liquified natural gas releases greenhouse gases, GHGs to the atmosphere and water bodies. It has been estimated recently that CO2 rise at 2.4 parts per million.
Historically, an unusual aspect of the recent rise in [tex]CO_2[/tex] levels is due to the fact that: B. [tex]CO_2[/tex] reacts so quickly with other compounds that it should not be occurring.
Carbon is a non-metallic and tetravalent chemical element represented with the chemical symbol C and it has an atomic number (number of protons) of six (6).
In Chemistry, the two (2) simplest and most common oxide of carbon (oxocarbon) include the following:
Carbon monoxide (CO)Carbon dioxide ([tex]CO_2[/tex])Carbon dioxide ([tex]CO_2[/tex]) is a greenhouse gas and it occurs naturally as a trace gas within the atmosphere of planet Earth. Also, it should be noted that carbon dioxide ([tex]CO_2[/tex]) is a highly reactive gas which chemically reacts with other chemical compounds, but it is still occurring in abundance.
In recent times, there has been a significant rise in the level of carbon dioxide ([tex]CO_2[/tex]) as a result of an increase in emission by industries, excessive burning of organic compounds, which in turn causes global warming and the depletion of Earth's ozone layer.
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Imagine that you read a study of the effects of exercise on the prevalence of heart disease in women ages 35 to 65. Although you believe the experiment was carried out in an appropriate manner, you still do not believe the results. You decide to conduct your own study to see for yourself. To determine if the results of the first study are valid, would you want to do everything the same way as the first study or would you change several of the variables, such as studying men, or looking at different age groups? Explain your choice, and explain the consequences of the other choice.
Answer:
In the given case, in my opinion, one should perform the experiment in a similar manner with no change. An experiment is done many times in order to omit any influences of sampling or handling on the outcomes of the study. For this purpose, the repetitive experiments have to be performed in a similar way as the previous ones were performed. After that, the outcomes of the repetitive experiment and the initial one are compared.
If any conditions or variables are changed in the experiment, the outcomes of the repeated experiment cannot be compared with the initial one. As variations in experimental material, variables, or procedure would have influenced the outcomes.
Answer:
The correct answer is - the study will follow same way as the first study conducted.
Explanation:
If any research or study is meant to be tested the most comparable and accurate one should conduct his or her study on the same way the experiment has been conducted first time. It should not change any variable or conditions as it may lead to fluctuation in the results as well.
So the change in the variable will lead to the change in the results and it will be tough to compare the results.
Thus, the correct answer is - the study will follow same way as the first study conducted.
To be most comparable, you would conduct your new study in the exact same manner as the previous study. If you were to change any of the variables, then the results might change as well; thus, you would not be able to compare your new results to the first study.
Which structure contains intertwined capillaries from the mother and the developing embryo?
Answer:
The structure that contains intertwined capillaries from the mother and the developing embryo is PLACENTA.
Explanation:
Placenta is a structure composed of both embryonic and maternal tissues. It supplies nutrients to the developing embryo.
Placenta is a unique organ found mainly in mammals, that allows developing fetus to have all the nutrients from their mother's blood stream even before they are born.
Besides providing the nutrients, placenta also provides attachment of fetus to the mother's Uterine wall and allow the fetus to transfer all the waste products to the mother's blood for excretion.
Placenta composed of 2 parts : The maternal part called as Decidua Basalis and the fetal part called as Chorion Frondosum. The parts are held together by Anchoring Villi.
Maternal blood flows from the maternal circulatory system through the intervillous space (space surrounding the chorion) nutrients and other exchange occurs and blood flows back in the maternal circulation.