Answer:
A.) Analogous Structures
Explanation:
Smilodon and Thylacomilus don't share an ancestor, so they are most certainly not related. Analogous Structures refers to the fact of animals species having a similar body structure, though they have evolved separately.
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The study of a living being is called biology. There are two types of living beings and these are plants and animals.
The correct answer to the question is option A that is an analogous organ.
What is an analogous organ?
Analogous Structures
An analogous organ pertains to an organ that functions similarly to the organ from another yet evolutionary disparate species.According to the question, Smilodon and Thylacomilus don't share an ancestor, so they are most certainly not related. Analogous Structures refer to the fact of animals species having a similar body structure, though they have evolved separately.
Hence, the correct answer is option A.
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In normal humans, sex cells contain the _________ number of chromosomes.
Final answer:
Normal human sex cells contain a haploid number of 23 chromosomes, differing from somatic cells which have a diploid number of 46, divided into 23 pairs.
Explanation:
In normal humans, sex cells contain the haploid number of chromosomes. This means that each sex cell, or gamete, carries a single set of 23 chromosomes, one of which is a sex chromosome. In contrast, the somatic cells of humans (any cell of the body except sperm or egg cells) contain a diploid set, which amounts to 46 chromosomes, making up 23 pairs.
During the process of meiosis, the chromosome number is halved from the diploid to the haploid state to ensure that upon fertilization, the resulting offspring will have the correct diploid number. A normal human karyotype illustrates this balance, showing 22 pairs of autosomes and one pair of sex chromosomes: two X chromosomes in females, and one X and one Y chromosome in males.
how would you use red, blue, and yellow marbles to model a carbon atom
I attached a picture showing how to do it
Answer:
The correct answer is - arrange yellow and blue in the center as proton and neutron while red as electrons revolving in a different shell.
Explanation:
The carbon atom has 6 protons and 6 neutrons present in the nucleus of the atom while 6 electrons present in the shell. The inner shell has two and the outer most shell has 4 electrons.
One can represent all three color balls as an electron, proton, and neutron to model the carbon atom.
Circle All words that correctly apply to/describe hemoglobin:
(A.) protein
(B.) carbohydrate
(C.) composed of amino acid
(D.) chemical molecules
(E.) composed of DNA.
(F.) composed of RNA
(G.) carries O2 through the bloodstream
Hemoglobin, found in red blood cells, is a protein made up of four subunits and heme groups that bind oxygen, allowing it to transport oxygen throughout the bloodstream.
Explanation:Hemoglobin is a protein found inside red blood cells and is responsible for carrying oxygen (O2) to cells and carbon dioxide (CO2) to the lungs. It is made up of four symmetrical subunits and four heme groups that contain iron, which binds oxygen. The presence of iron gives blood its characteristic red color. Hemoglobin's structure includes two alpha subunits and two beta subunits, each of which can bind to an oxygen molecule, allowing the entire hemoglobin molecule to carry up to four oxygen molecules.
Why do strawberry cells need dna
DNA manages all the cells activities and "tells" them what to do. DNA also gives coded regulations for the strawberry so that it can create proteins.
What is DNA?Humans and nearly all other species carry their genetic information in DNA, also known as deoxyribonucleic acid. The DNA of an individual can be found in almost all of their cells.
The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but there is also a tiny quantity of DNA in the mitochondria (where it is called mitochondrial DNA or mtDNA).
Adenine (A), guanine (G), cytosine (C), and thymine (C) are the four chemical bases that make up the code that stores the information in DNA (T). More than 99 percent of the 3 billion bases that make up human DNA are the same in every person.
Therefore, DNA manages all the cells activities and "tells" them what to do. DNA also gives coded regulations for the strawberry so that it can create proteins.
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One cat carries heterozygous, short-haired traits (Ss), and its mate carries homozygous long-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having short hair.
One cat carries heterozygous long haired traits SS and its mate carries homozygous short haired traits ss
a trait that is always expressed. ... One cat carries heterozygous, short-haired traits (Ss), and its mate carries homozygous long-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having short hair.
Using a Punnett square, the probability of an offspring from a heterozygous short-haired (Ss) and homozygous long-haired (ss) parent having short hair is 50%, since the resulting genotypes would be Ss and ss in equal proportions.
To determine the probability of an offspring having short hair from a parent carrying heterozygous short-haired traits (Ss) and another carrying homozygous long-haired traits (ss), we use a Punnett square. When S (short hair) is dominant over s (long hair), the possible genotypes for their offspring are Ss and ss.
The Punnett square is as follows:
Ss (heterozygous short hair)ss (homozygous long hair)Thus, the probabilities are:Short hair (Ss): 50% or 1/2Long hair (ss): 50% or 1/2Therefore, there is a 50% chance that one of their offspring will have short hair.
Can someone please explain to me chemical, mechanical, thermal and electrical energy? Thank you. :)
Answer:
Chemical Energy is released when bonds form in a chemical reaction, often producing heat as a by-product.
Mechanical Energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.
Thermal Energy is what we call energy that comes from the temperature of matter. The hotter the substance, the more its molecules vibrate, and therefore the higher its thermal energy.
Electrical Energy is caused by moving electric charges called electrons. The faster the charges move, the more electrical energy they carry.
Explanation:
The chart shows the diagnoses for three patients.
Diagnosis of Illness in Three Patients
Patient Diagnosis
Enya Bronchitis
Ancel Dermatitis
Elliot Gastritis
What best describes the relationship between the diagnoses?
All three patients had a picture taken of the infected area.
All three patients have a problem with their digestive systems.
All three patients have
They all attack different parts of the body. Dermatitis is on the skin, gastritis deals with the intestines, and bronchitis is affecting the airways including the lungs. *What is the third answer choice?*
Answer:
the answer is D. All three patients have inflammation but in different areas of the body.
Explanation:
Station 1! Help pls!
1. Which of the following groups has the largest number of different organisms?
A. Family
B. Class
C. Kingdom
D. Domain
2. Which of the following is not one of the three domains?
A. Archaea
B. Phylum
C. Eukarya
D. Bacteria
3. Which of the following groups contain organisms that are most closely related?
A. Species
B. Class
C. Genus
D. Order
4. Organisms are called by their scientific name, which consists of their ____ and ____.
A. Genus; Species
B. Order; Family
C. Class; Family
D. Species; Kingdom
Answer:
1. D
2. B
3. A
4. A
Final answer:
The D. domain contains the largest diversity of organisms, B. Phylum is not a domain, species are the most closely related organisms, and the scientific name of an organism consists of its A. Genus and Species.
Explanation:
In biological classification, the hierarchy of categories from most inclusive to most specific is: domain, kingdom, phylum, class, order, family, genus, and species. The answers to the questions presented are as follows:
Domain is the classification group with the largest number of different organisms.Phylum is not one of the three domains; the three domains are Bacteria, Archaea, and Eukarya.The group that contains organisms that are most closely related is Species.Organisms are called by their scientific name, which consists of their Genus and Species.The binomial nomenclature is the system of nomenclature in which each species is given a unique name that consists of two parts, the generic name (genus) and the specific name (species).
Water accounts for the highest percentage of body mass in
Younger woman
Younger men
Older women
Older men
Final answer:
Younger men typically have the highest percentage of body water content due to greater muscle mass and lower body fat compared to women. As age increases, the percentage of body water generally decreases for all adults.
Explanation:
The question pertains to the percentage of body water content in different demographics. Water accounts for a significant portion of the human body, constituting about 50-70% of an adult's body weight. The water content is inversely related to the fat content, which means that individuals with less body fat tend to have a higher percentage of body water. Considering that men have greater muscle mass and a lower body fat percentage compared to women, and because muscle tissue contains more water than fat tissue, younger men typically have a higher percentage of body water than younger women. As we age, the percentage of body water declines to as low as 45% in older adults. Therefore, between younger women, younger men, older women, and older men, younger men would generally have the highest percentage of body water content.
Plants absorb nitrogen in the form of nitrate ions and ___ ions
Answer:
ammonium
Explanation:
Plants absorb nitrogen in the form of nitrate ions and ammonium(NH4^+) ions.
prairie dogs are rodents that eat nonwoody plants and live in burrows in the expanse of the prairie biome. in which of these other biomes would an animal with similar adaptions live: taiga, tropical rain forest, tundra, or deciduous forest? explain your answer
Answer:
tundra
Explanation:
The tundra is a biome in which there are no large trees, and the ones that are present are small as a typical grass. The majority of the plants are nonwoody ones. The climate is very cold throughout most of the year, so the animals that are able to make borrows are using them for the majority of the year, as it is much warmer below the ground than on the surface. If we take the way of lifestyle the prairie dog has and what it requires, then it will not be weird if an animal with very similar characteristics is found living in the tundra. The basic conditions seem to very similar, so an animal that is prairie dog-like, will only need slight adaptations in order to survive in that environment, mostly thicker fur, and ability to have a long hibernation.
What is plant respiration in simple terms? (Cellular respiration)
Answer:
Cellular respiration is the process of breaking sugar down into a form that the cell can utilize as energy.
Explanation:
This happens in all types of life. Cellular respiration takes in food and uses it to produce ATP, a chemical which the cell uses for energy. Typically, this process uses oxygen and is known as aerobic respiration.
I hope this was helpful!
A company wants to start a nuclear power plant as a way to produce clean energy. They want to use the same reaction that's used in thermonuclear weapons. Which of the following explains why this is not possible?
A. The energy in nuclear fission produces chemicals that harm the environment.
B. The energy in nuclear fusion can't be generated in a controlled manner.
C. The energy in nuclear fusion is too small to generate electricity.
D. The energy in nuclear fission burns out as soon as it's produced.
Please don't guess, try to give the right answer
Hey! I took the Penn foster exam, and i answered (a). I got it wrong, so I tried to find the correct answer. I’m pretty sure the answer is (b), and here’s some text from the Penn foster lesson.
“Unfortunately, nuclear fusion can't be used in nuclear power plants as the energy required to start a fusion is very large. The energy required to start a fusion reaction cannot be generated in a controlled manner.”
Anyways, hope this helps:) If this is wrong, please comment and tell me the correct answer.
5)
All the plants grown from a given type of genetically engineered seed are genetically identical. On the one had, uniformity can make it easier for a farmer to manage the crops. Which is the best reason why the loss of genetic variation is an environmental concern?
Hi!
If there isn't genetic variation, every identical copy of the organism has the same immunity to a disease. If a disease that they don't have immunity to comes, they will all die.
Hope this helps!
What cell don't have any membrane bound organelles but they do have a nucleus
A. Dna
B. Prokaryotic
C. Nucleus
Answer:
Dna
Explanation:
The nucleus is surrounded by a membrane. Prokaryotic cells do not have a nucleus
Prokaryotic cell don't have any membrane bound organelles but they do have a nucleus. Thus, the correct option is B.
What is prokaryotic cell?Prokaryotic cells are defined as the cell which single-celled, non bound organelle microorganisms known to be the earliest on earth. Prokaryotes comprises bacteria and archaea.
The photosynthetic prokaryotes comprises cyanobacteria that perform photosynthesis. A prokaryotic cell comprises of a single membrane and hence, all the reactions occur within the cytoplasm. The below diagram shows a prokaryotic cell.
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Which characteristics do photosynthesis and
cellular respiration have in common?
Check all that apply.
Photosynthesis and cellular respiration both involve the metabolic pathway of carbohydrates, use electron transport chains for energy capture, and are part of a biological cycle linking the two with the exchange of oxygen, glucose, carbon dioxide, and water.
The characteristics that photosynthesis and cellular respiration have in common include:
Both processes involve the metabolic pathway of carbohydrates to produce energy, with photosynthesis building carbohydrates and cellular respiration breaking them down.
They both utilize an electron transport chain to capture energy necessary for other reactions.
These processes form a cycle where photosynthesis produces oxygen and glucose needed for cellular respiration, while cellular respiration generates carbon dioxide and water, which are inputs for photosynthesis.
Additionally, while photosynthesis occurs in the chloroplasts of plant cells, cellular respiration takes place in the mitochondria of all eukaryotic cells, illustrating that both rely on specialized cell organelles to occur.
Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste?
A. Coal
B. Oil
C. Solar
D. Nuclear
Answer: D. nuclear
Explanation:
Nuclear types of nonrenewable fuel sources requires the storage of radioactive waste, hence option D is correct.
Uranium is a nonrenewable energy source that may be used to divide its atoms into heat and eventually electricity through a process known as nuclear fission.
The element uranium is the one that is most frequently employed in nuclear power reactors. Nuclear power plants typically employ U-235, a highly uncommon form of uranium.
A non-renewable resource is uranium. Around the world, generating power via nuclear energy is a common practice.
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Someone pls help!
The picture below shows warm air over land and cool air over water.
Air currents form due to the uneven heating of Earth. According to the picture above, what direction will the air currents most likely move?
A. straight down over the land
B. straight up above the water
C. from the water toward the land
D. from the land toward the water
Answer:
I think it is D
Explanation:
Driven by convection, the air currents will most likely move from the land towards the water as the warm air over the heated land rises and the cool air over water descends.
Explanation:Based on your question, the air currents will most likely move from the land toward the water. This movement is driven by convection, a process by which heat is transferred within fluids. When the land is heated by the Sun, the air above it also gets warm. This warm air is less dense, which causes it to rise. Meanwhile, the cool air above the water which is denser descends creating a pressure difference. To equalize this pressure difference, the warm air above the land moves towards the cool air above the water, contributing to the air currents.
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IM GIVING 25 POINTS AND 5 STAR RATING AND THANKS TO WHOEVER AN ANSWER IS LESS THAN 20 MINUTES PLEASE HELP!!!!!!
Sickle cell anemia is known to run in a family. A pedigree chart for this family is shown below. The parents are shown at the top and from left to right appear as a half-shaded circle next to a half-shaded square. The two are connected by a straight line. Below the parent pair is a vertical straight line connecting to the next row of circles and squares which are the offspring. Starting from left an unshaded square, half-shaded circle, another half-shaded circle, and a completely shaded square are shown. All of these are also connected by a horizontal straight line.
What percentage of the offspring are carriers of the disease but do not have it? (4 points)
0%
25%
50%
100%
Answer:
b
Explanation:
Answer:
25%
Explanation:
Which of the following is a sustainable practice?
A. Leaving trash bags at a local park
B. Flushing medicine down the toilet
C. Throwing jars in the trash can
D. Using only geothermal energy
Answer:
D. Using only geothermal energy is a sustainable practice.
Explanation:
Geothermal energy is heat derived within the sub-surface of the earth.
The statement that depicts sustainable practice is using only geothermal energy (option D).
What is Sustainability?Sustainability refers to a way of configuring civilization and human activity so that society, its members and its economies are able to meet their needs and express their greatest potential in the present, while preserving biodiversity and natural ecosystems, planning and acting for the ability to maintain these necessary resources for future generations.
In sustainability practice, the safety of the environment is the major focus. Therefore, the use of natural resources such as geothermal energy is a sustainable practice.
Therefore, option D is correct.
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Which do scientists link to increase hurricane strength
Scientists link increased hurricane strength with the help of both multi-natural cycles as well as warm ocean water from global warming.
What is global warming?Global warming is defined as the long-term warming of the planet's overall temperature. Though this global warming trend has been going on for a long time, it has significantly raised in the last hundred years due to the burning of fossil fuels. As the human population has increased in large amounts, so has the volume of fossil fuels burned.It is caused by raised concentrations of greenhouse gases in the atmosphere, mainly from human works such as burning fossil fuels, and farming.Overall, glaciers are melting at a faster rate with temperature. Sea ice in the Arctic Ocean around the North Pole is melting faster with the cold temperatures.To learn more about global warming refer to:
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How does the process of gel electrophoresis separate DNA fragments?
DNA is negatively charged due to its phosphate groups. Gel electrophoresis has one side that is positive and other that is negative. Once dna fragments are placed inside. The bigger fragments will move towards the positive side since positive is attracted to negative.
Answer:
For the separation of DNA fragments we use gel electrophoresis.
Explanation:
Since DNA fragments are negatively charged molecules they can be separated by forcing them to move towards the positive electrode anode under an electric field through a medium or matrix. The most common matrix is agarose. The DNA fragments separate according to their size through sieving effect provided by the agarose gel. Hence, the smaller the fragment size, the farther it moves. The separated DNA fragments can be visualized only after staining the DNA with a compound known as ethidium bromide followed by exposure to UV radiations. You can see the bright orange colored bands of DNA in a ethidium bromide stained gel exposed to UV light.
explain why water logged soils are usually deficient in nitrates
Low levels of oxygen in/by the root zone causes soil & plants to turn deficient and die .
another reason is because anaerobic microbes that have gotten waterlogged create a toxic/bad waste that harms its surrounding living plants.
Why do the stars appear to be moving across the sky
because the world is spinning at a different angle and speed as it its orbiting the sun.
Stars appear to move across the sky at night because Earth spins on its axis and it is moving around the Sun. Because the Earth spins half a turn in a night, a star visible low in the east early in the evening will appear to rise and move in an arc across the southern sky and set in the west before morning. Stars in the center of the southern sky will disappear below the western horizon halfway through the night. Also, other stars will rise in the east all through the night. The stars that can be seen are always in the sky at some time during the day, but some rise while the sun is in the sky and are hidden by the glare of the bright sky.
Hope this helps!
the interaction between the lions and vultures is an example of
It is an example of ecosystem. The lion eats its prey and the vulture then eats whatever is leftover. The vulture benefits and the lion is not harmed and doesn't benefit from it. A relationship in which one organism benefits and the other is harmed.
what gets wetter & wetter the more it dries?
Answer:
A towel
Explanation:
towel or napkin
____________
why does fossil fuel use in the United States make the u.s. vunerable to the political wishes of foreign countries?
a. the US is a net exporter of fossil fuels
b. fossil fuels lead to global climate change
c. the US imports much of it's petroleum from foreign countries which set the prices
d. all of the above
Answer:
Option A ,the US is a net exporter of fossil fuels
Explanation:
In the recent time, the prices of fossil fuels (i.e crude) oil fell very low due to which the prices of processed petroleum products such as petrol, diesel, etc reduced to the a very low value in last 30 years. This all happened because new oil reserves have been explored in US due to which the the price of crude oil has dropped globally.
In developing countries like India, price of petrol and diesel is one of the political agenda.
Thus, fossil fuel use in the United States make the u.s. vunerable to the political wishes of foreign countries
Option A is correct
U.S. vulnerability due to fossil fuel reliance is linked to the fact that it imports much of its petroleum, making it subject to foreign pricing and political pressures (option c).
The reliance of the United States on fossil fuel imports makes the nation vulnerable to the political whims of foreign countries primarily because the U.S. imports a substantial portion of its petroleum from these countries. This dependence on foreign oil means that the US is susceptible to fluctuations in fuel prices, determined by the exporting countries or global markets (option c). Additionally, the geopolitics surrounding fossil fuels can compel the United States to engage in foreign policies or military actions to secure energy resources, influencing its political and economic decisions.
Historically, the United States has developed policies to reduce reliance on Middle Eastern oil by diversifying its sources, turning to countries like Canada, Mexico, Venezuela, and Nigeria. The presence of oil reserves within a nation can have a massive economic impact, providing jobs and dividends to investors, influencing global geopolitics, and sometimes leading to power imbalances and conflicts over resources.
why correct answer is B. selective breeding? someone please give me a explanation
Answer:
It should be D but selective breeding would work because of the selection of dog breeders trying to get new dogs such as a cockapoo which is a cocker spanole and a poodle. Also many other dog breeds that were selected to try out and breed.
Explanation:
Answer:
B. Selective breeding
Explanation:
Selective breeding refers to mating between parent organisms having desired features. This is done to obtain the progeny carrying the desired features from both parent organisms.
Selective mating between existing varieties of dog carrying desired traits gave rise to many new varieties that had features of both the parent varieties. Continued selecting breeding between existing varieties produced several new varieties of dogs.
Which process uses proteins to move molecules against a concentration gradient?
Facilitated Diffusion
Active transport uses carrier proteins to move molecules against a concentration gradient, requiring energy in the form of ATP, as seen in the sodium-potassium pump of nerve cells.
Explanation:The process that uses proteins to move molecules against a concentration gradient is known as active transport. During active transport, carrier proteins or pumps use energy, usually in the form of ATP (adenosine triphosphate), to move substances from an area of low concentration to an area of high concentration. This is crucial for maintaining the necessary concentrations of ions and other substances for cell function, despite the passive movements that tend to even out concentrations.
Examples include the sodium-potassium pump in nerve cells, which is essential for transmitting messages to the brain.
Which is a characteristic of pseudoscience
Pseudoscience is characterized by the lack of scientific evidence and reliance on anecdotal or subjective experiences. It lacks the rigor and methodology of a scientific investigation.
Explanation:Lack of scientific support and dependence on anecdotal or subjective experiences are traits of pseudoscience. Let's take the example of someone claiming to have created a medication that will cause you to lose weight without the need for exercise or dietary modifications.
It would be regarded as pseudoscience if there was no scientific study or evidence to back up this assertion and it was only based on the testimonies of a small number of people. Pseudoscience frequently lacks the methodological rigor of a scientific inquiry, making it impossible to verify or duplicate its conclusions.
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Pseudoscience is presented as scientific but does not follow scientific standards and cannot be tested or falsified. An example of pseudoscience is astrology, which lacks experimental backing.
In contrast, legitimate scientific disciplines, such as astronomy, rely on testable and falsifiable theories.