Evolutionary change is caused by four primary mechanisms: Genetic drift, natural selection, gene flow, and mutation. Each of these mechanisms contribute to the diversity and adaptation of populations.
Explanation:The causes of evolutionary change are: 1) Genetic drift, 2) Natural selection, 3) Gene flow and 4) Mutation.
Genetic drift refers to random changes in the frequencies of alleles within a population. It can result in significant changes in a population's genome, especially in small populations.
Natural selection is the process by which traits that enhance survival and reproduction become more common in successive generations of a population. It drives the adaptation of populations to their environments and is a key mechanism of evolution.
Gene flow happens when individuals from one population migrate to and breed in a second population. This can introduce new genetic variations to the receiving population.
Mutation refers to changes in an organism's DNA. It can introduce novel genotypic and phenotypic variations to a species over time, and is a key driver of diversity in populations.
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The process by which cells use oxygen to produce energy from food
{{FIFTY POINTS}} could someone help me place five birds on a cladogram, and explain why you put them where you did?
Answer:
In the cladogram, I've put the pelican further away from the other birds Because it has a different order that the birds .The other birds are in order "Passeriformes" and the pelican is in order"Pelecaliforms"
(Refer to the attachment)
In constructing a cladogram for five birds, we utilize cladistics to group birds based on shared characteristics and common ancestry.
When placing five birds on a cladogram, one would begin by identifying shared characteristics that define different clades. Cladistics is the method used for this purpose, which sorts organisms into groups called clades based on common ancestry. In constructing a cladogram, we would start with the most recent common ancestor and work our way outwards, placing species that share more recent ancestors closer together on the cladogram.
To exemplify, consider birds A, B, C, D, and E. Let's say birds A and B share a very recent common ancestor indicative of a specific adaptation, such as elongated beaks for accessing deep nectar sources. They would be placed as sister species. Birds C, D, and E might possess another shared trait, such as similar migratory patterns, suggesting that they diverged from a different common ancestor more recently than the split between A/B and C/D/E. Therefore, C, D, and E would be grouped together, with lines spreading out to depict their divergence based on the order in which their unique traits emerged.
The explanations for placing each bird where it is on the cladogram come from a thorough understanding of their evolutionary relationships, informed by morphological, genetic, and behavioral data. In the context of placing reptiles and birds in the same clade, this is based on significant evidence indicating that birds evolved from reptilian ancestors. This is why in phylogenetic classification, birds are included in the same clade as modern reptiles.
Garth has had a number of drinks and cannot walk a straight line: the alcohol appears to have affected his:
Cerebellum
Since brainly wont let me provide a link, the website is talk2prevent and its a pdf
Which of the following is a single-gene trait in humans?
A.widow's peak hairline
B.height
C.intelligence
Koala bears can eat only certain kinds of Australian eucalyptus leaves. Koalas are considered _____. a new species an underfed species a specialized species
Answer: specialist eaters
Explanation:
Answer:
The correct answer is Marsupial.
Explanation:
The word 'marsupial' originates from the Latin word "marsupium", which means 'pouch’. Most, but not all, female marsupials have a permanent pouch in which to raise their young. In the earlier times, Koalas were considered as bears by the Australians, this is the reason why they were called Koala Bears.
Which could be a reason viruses are considered nonliving things? Viruses come from cells. Viruses produce cells. Viruses are made of DNA and proteins, but not cells. Viruses attack cells and are dangerous to them.
Answer: Option C
Explanation:
The reasons why the viruses are considered to be non living things are:
They contain DNA and proteins but they are not considered as cells this is because they do not perform any cellular machinery as they they do not have organelles.
They do need host to survive they cannot live independently in nature. They do not grow in size and cannot keep them in steady state.
They cannot perform metabolic reactions and cannot generate energy for the life processes.
C is correct on Edge 2021
what does the column number of the periodic table tell you about the nonmetal elements ?
A. the number of protons in its outermost shell
B. The number of electrons in its outermost shell
C. the number of outer shells in the atom
D. the number of bonds possible in the outermost shell
OPTION B.
The column number of the periodic table tells you about the number of outer shells in the atom for nonmetal elements.
Explanation:The column number of the periodic table tells you about the number of outer shells in the atom for nonmetal elements. Each column, also known as a group or family, represents the number of valence electrons in the outermost shell. Valence electrons play a key role in determining the chemical properties and reactivity of an element. For example, the nonmetal elements in Group 17 (column 17) called the halogens, have 7 valence electrons and tend to gain one electron to achieve a full outer shell, making them highly reactive.
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What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell?1. capsule2. pili3. cell wall4. flagella5. nucleoid region
Answer:
3
Explanation:
bacteria possess cell wall made of murein
What is the role of the skin in excretion?
Not multiple choice.The function of the larger, more typical pinecone is:
to produce pollen
to produce sperm
to produce eggs
to fertilize seeds
Answer:
to produce eggs
Explanation:
The larger pinecone are the female cones of the plant. They are responsible for producing eggs.
The male cones are yellow, formed by numerous scales, with bags full of pollen, the female cones are greenish formed by scales in which there are uncovered eggs.
In their maturation, male cones or catkins release millions of pollen grains to the wind, which are transported by the wind and fall into the female cones, fertilizing the eggs. Fertilized, the female cone closes forming the pinecone, inside which are the pine nuts, the product of the fertilized eggs. At the end of a year or so, the pine cone opens and lets the pine nuts fall, which disperse in the wind until they fall in a suitable place for their germination.
Which of the following is an example of a non-falsifiable hypothesis? A. There is a teacup orbiting the Milky Way galaxy. B. There is no life on Mars. C. The human species started in Africa. D. Humans cannot live without the amino acid methionine
The non-falsifiable hypothesis listed above is A. There is a teacup orbiting the Milky Way galaxy.
A non-falsifiable hypothesis is one that cannot be proven to be either right or wrong and there are two main reasons for this:
The hypothesis is based on a subjective premise. For instance, saying football is better than baseball. This is subjective because it depends on the person and so we cannot say for certain which is better or worse.Based on our current technological abilities, it is impossible to prove the hypothesis either wrong or right.We cannot prove that there is a teacup orbiting the Milky Way galaxy because we simply do not have the technological capacity to build a vessel that can go around the Milky Way to research this so it is a non-falsifiable hypothesis.
All the other options can be proven to either be right or wrong because:
we can go to Mars to check if there is any life, we can look at fossils to find out if humans came from Africa and,we can test to see if human cells survive without amino acid methionine.We cannot however, confirm if a teacup is orbiting the Milky Way so this is non-falsifiable.
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Dna replication occurs in preparation for
Answer:
Dna replication occurs in preparation for production of RNA
1. Variations in a population of moths allow for some of its members to be able to adapt to environmental changes. The better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) Describe three mechanisms in which variation can occur within a species population. (b) Explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. Justify your answer.
Answer:
a) mutation, mimicry and camouflage
b) During an industrial soot there would be black ashes throughout the environment, spotted moths blend in with the surroundings making them more difficult to spot then white moths. Therefore white moths are easier for predators to prey on.
Explanation:
An automobile breaks to a stop from an initial speed of 14 meters per second in 7 seconds. What is the automobile's deceleration?
Answer:
Acceleration= -2m/s
Deceleration=2m/s
Explanation:
(0-14)/7
-14/7
-2
If you repeat an experiment and the results are very different from the results you got the first time, the next step would be to
a. try a different experiment.
b. trust the second results.
c. decide which results are better.
d. repeat the experiment again.
Answer:
repeat the experiment again and if the third one matches with first one then first one is right and if it matches with second one than the second one is right
The experimental method is the involvement of the independent and dependent variables. The next step should be repeating the experiment again. Thus, option d is correct.
What is the experimental method?The experimental method has been the controlled method that involves the two groups that have been constituted of the variables that are controlled, dependent and independent. It tests the falsifiability of the hypothesis.
The experimental method must be performed again as there is a difference between the results of the experiment. So as to conclude the reliability and definitive findings of the experiment must be repeated again and must be cross-checked with the previous results.
Therefore, option d. the experiment must be repeated again.
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State one way the sciencists have been able to manipulate the algaes process to be more strontuim selective
They could use genetic engineering to produce algae that are able to collect more strontium.
How Do scientists manipulate the algae's process to be more strontium selective?Through gene manipulationBy modifying their DNA to make them better at taking in the strontium.By finding organisms with the specific genes they need, cut them out, and then insert them into the algae.learn more about Genetic engineering here:
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Please help me somebody. Honey Bees are becoming extinct. Which biotechnology could we use to help alleviate that problem and produce more honey bees?
A: Genetic engineering
B: Cloning
B: Artificial selection / Selective breeding
Answer:
Cloning
Explanation:
im doing the same study guide
A scientist asks a question and discovers that increased temperature decreases the number of offspring that an organism produces. Then, the scientist asks a new question about the impact of climate change on the species because the scientist's first question was not a scientific question. The scientist modified the hypothesis for the investigation. The results of the investigation led to new scientific questions. Questions about the impact of temperature reflect an opinion.
Answer the results of the investigation led to new scientific questions.
Explanation:
Answer:
The correct answer will be option the results of the investigation led to new scientific questions.
Explanation:
A scientific question is a question which explains any natural phenomenon, should have answers based on the observations which could be tested leading to the generation of a new hypothesis.
In the given question he asks a new question which shows that the old scientific questions has been answered but not real answer so it leads to the generation of new puzzles or questions one of which is "To study the impact of climate change on the species".
Thus, the results of the investigation led to new scientific questions is the correct answer.
Which process can affect the rate of carbon dioxide emissions or other greenhouse gas emissions by changing average temperatures?
A. Axial precession
B. Cloud cover feedback
C. Continental drift
D. Greenhouse gas feedback
Please don't guess the answer, if you know you know it please answer. Thank you
Answer:
Greenhouse gas feedback
Explanation:
Greenhouse gas feedback may be defined as the mechanism of increase or decrease the amount of greenhouse gases in the atmosphere. The feedback mechanism may be positive or negative.
Greenhouse gas feedback can affect the rate of greenhouse gas emissions by itself changing the average temperature. This feedback results in the additional warming in the environment.
Thus, the correct answer is option (D).
Answer:
d
Explanation:
Which reproductive gametes are powered by many ATP and flagella? A. Blastula B. Eggs C. Sperm D. Ovum
Sperm is reproductive gametes are powered by many ATP and flagella.
It is the male gamete whose movement is powered by ATP.What is a gamete?Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells and male gametes are called sperm. Gametes are haploid cells and each cell carries only one copy of each chromosome.What is the function of gametes?
Gametes serve two functions:-
They have the physiological capability to fuse with a gamete from the opposite s.e.x.It form a single cell that initiates the development of a new organism and the next generation.Hence, C option is correct.
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The idea that viruses originated as genetic material that was able to move within a genome, eventually exiting a cell and entering another is the _______ hypothesis.
A. progressive
B. recessive
C. coevolution
D. regressive
Please help.
Answer:
A. Progressive
Explanation:
Origin of viruses is explained variously. According to one hypothesis, viruses are thought to be originated from mobile genetic elements. This is also called a progressive hypothesis of the origin of viruses.
According to this hypothesis, some sequences from the genomes acquired the ability to move from one locus to another locus of genome. Gradually, these mobile genetic elements acquired the ability to move between different cells and led to the evolution of viruses.
Answer:
A. progressive
Explanation:
Progressive Hypothesis: The DNA and RNA that show up inside viruses originally came from a living cell. This nucleic acid evolved new abilities to infect and replicate.
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Which type of unconformity occurs when sedimentary rock overlies igneous rock?
Question 8 options:
disconformity
nonconformity
angular unconformity
conformity
Answer:
nonconformity
Explanation:
There are multiple types of unconformity that occur in nature, all of which are base on the relative position of the types of rocks. The nonconformity is one of the unconformities. This type of unconformity occurs when sedimentary rock overlies igneous or metamorphic rocks that existed there before the sedimentary rocks covered them. The nonconformity can be seen in lots of places around the world, but it is most common on places where there are water bodies like lakes, seas, oceans, ponds, marshes, or on places where there were water bodies of this type in the past.
If a cell has the ability to take in water, food molecules, and other necessary materials this indicates it is capable of... A: Biosynthesis B: Nutrition C: Absorption D: Digestion
Answer: C: Absorption
Explanation:
The absorption is a process of direct intake of water and nutrients in the form of simple molecules by the body of the organisms. These materials are retained within the body and converted into forms of energy which can be utilized for the purpose of cellular metabolism and performing various physical functions.
Which cells are associated with the humoral and cell-mediated parts of the immune system?
Humoral—B lymphocytes; cell mediated—T lymphocytes
Humoral—B lymphocytes; cell mediated—neutrophils
Humoral—T lymphocytes; cell mediated—neutrophils
Humoral—neutrophils; cell mediated—T lymphocytes
Answer:
B cells and T cells, respectively.
Explanation:
Humoral and cell-mediated immunity are parts of adaptive immunity, which is acquired by an individual in his lifetime due to exposure of pathogens. Cells involved in humoral immunity are B lymphocytes or B cells. These cells form antibodies to fight against infections.
Cells involved in cell-mediated immunity are T lymphocytes or T cells. These cells release various cytokines that activate other immune cells or kill pathogens directly.
Thus, the correct answers are B cells and T cells, respectively.
Answer:
A and C
Explanation:
Through which structure do wastes pass into the rectuin?
a. large intestine
b. villus
c. small intestine
d. duodenum
Answer:
A. Large intestine
Explanation:
This is because that's how the body works lol :)
Through large intestine waste is passed into the rectum.
Explanation:
In the digestive system the digested food material present in the stomach travels gradually from the duodenum to the small intestine where it splits into small molecules.
Whereas, absorption of those food material takes place through the small finger like structures present in the small intestine known as villi (singular-villus). After small intestine the food enters into large intestine where it reaches to the rectum to be excreted as waste.
What part of the cell does the electron transport chain take place?
A. Nucleolus
B. Mitochondria
C. Endoplasmic reticulum
D. Golgi apparatus
Hello There!
In Mitochondria, the electron transport chain takes place.
Answer:
Mitochondria
Explanation:
What if biological profiles were created to identify individuals who were most likely to engage in criminal behavior? What would be the possible consequences of identifying believed criminals before they were actually criminal?
Answer:
the possible consequences of identifying believed criminals is by doing a back ground check
Creating biological profiles to identify potential criminals raises ethical issues and overlooks the social and environmental factors leading to crime. Sociologists reject biological explanations, focusing instead on socio-environmental factors for understanding crime patterns.
The student's question concerns the potential consequences of creating biological profiles to preemptively identify individuals who might be more likely to engage in criminal behavior. It is essential to recognize that sociologists generally oppose relying on individual biology or psychology to explain criminal behavior, as these theories fail to account for the social patterning of crime seen across different locations and demographics.
Biological profiles and identifying potential criminals based on genetic predisposition could lead to significant ethical and social issues, including discrimination and violations of individual privacy. Genetic markers cannot reveal the complex interplay of social, environmental, and individual factors that lead to criminal behavior. Moreover, profiling based on biological traits could reinforce existing prejudices and stereotypes associated with gender, race, ethnicity, social class, and more.
It's important to recognize that such biological theories once held sway but today are considered inadequate in explaining criminal behavior. The focus has shifted to socio-environmental factors that contribute to crime, which suggest that targeted interventions and inclusive social policies are more effective in reducing crime than profiling based on biology.
In which of the following cases does an atom have a positive charge? A. There are more electrons than neutrons. B. There are more neutrons than electrons. C. There are more protons than electrons. D. There are more electrons than protons.
Answer:
D. There are more electrons than protons.
Hope i'm right
Explanation:
What point in this body of water is most likely to have no plants growing
Answer:
Point D
Explanation:
Point D is the point that is most likely to not have any plants growing in it. The reason why this point of the body of water will not have any plants is because of the lack of light. This part of the body of water is dark, with no light penetrating to it. The plants need light to survive, as it is a vital element in the process of photosynthesis. If there isn't any light, the plants can not perform photosynthesis, thus they can not produce their own food, which in turn means that they will not exist in such a place.
Answer: (POINT D )The aphotic zone: places where they aren't getting any sunlight .
Explanation: ///APEX 8/21/19
Which of these environments will have the highest average temperatures? A. Rural farms B. Suburban centers C. Ocean shorelines D. Urban cities
Answer:
D. Urban cities is a correct answer.
Explanation:
Urban cities have the highest average temperatures because of urban heat island effect makes the air temperature warmer.
An increase in the population and more land usage,modification in the land, decrease in the evaporation directs to expand the area and increase the average temperature which result in the increasing urban heat islands. The urban heat island is an aspect in which the surface temperature gets concentrated in the urban areas and the heat gets stored in the surface of the materials and solar energy gets absorbed and solar radiation is produced, which warmer the air and the higher heat islands increase the average heat temperature in the urban cities.
Thus the Urban cities has the highest average temperature.
Answer:
D. Urban cities
Explanation: