Two chromosomes that are very similar and carry the same genes are called ________chromosomes.

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Answer 1
Answer:

Answer:

Homologous chromosomes

Explanation:

Homologous chromosomes are two pieces of DNA within a diploid organism carry the same genes, one from each parental source


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You catch, tag, and release 100 fish back into a pond. According to the data below, what is the best estimate of the number of fish in the pond? a. 417 b. 500 c. 318 d. 124 Please select the best answer from the choices provided.

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i think it is a 417

Scientists assume that an organism’s ancestors required a climate similar to the climate required by the present-day organism.a. True
b. False

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a. True

This is somehow true. If the climate before, thousands of years ago was in harsh conditions; the same conditions today many organisms would not survive. Hence, certain climate conditions is needed for an organism complex such as mammals, humans and the similar organisms to thrive. 

Answer:

A. true (just took test)

Darwin hypothesized that there are definite steps to natural selection. Consider the model here. Use the Roman numerals (I - III) to guide you through the steps. Which is an accurate description of Darwin's hypothesized theory of natural selection? A) Sexual reproduction of bacteria cause variation. Some bacteria survive and some do not. Over time all of the bacteria should become extinct. B) In any population, variation exists. Some bacteria are resistant to antibiotics. Most bacteria die, but the bacteria that are resistant survive and reproduce. C) In a population of bacteria that are exposed to antibiotics, some bacteria change their genetic make-up and survive. The new genetic make-up is passed on to offspring. D) There is a change in the environment: an antibiotic is added. Some of the bacteria are capable of changing to the new environment. They survive and reproduce, passing along their favorable traits.

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Answer: Option D

Explanation: Natural selection come into action when some change takes place in the environment which affects the survival of the organism. Here the change is addition of antibiotics. So the bacterial cells which were able to adapt to the change, they survived and rest were killed. These resistant bacterial cells would pass on the genes to next generation and gradually population of resistant bacteria would increase.

I believe the answer is b

What tells the cell what to do

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The DNA does. DNA ( deoxyribonucleic acid) is the controller molecule of cells. It gives the codes for protein production, it determines when the cell will divide etc.
The nucleus is like the control center

Which term describes the energy that is stored due to the height of an object from the ground?

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The term that describes the energy that is stored due to the high of an object from the ground is called Gravitational Potential Energy.

Answer:

To summarize, potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

Which term refers to a change in one species that results from a change in another species that it interacts with? A) coevolution
B) commensalism
C) symbiosis
D) interaction

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A) Coevolution

Etimologycally, coevolution means evolutionate together.

Biologically, the changes in the two species affect reciprocally.

The right option is; A) coevolution

Coevolution is the term that refers to a change in one species that results from a change in another species that it interacts with.  

Coevolution is a process of mutual evolutionary change that takes place between two or more organisms as they interact with one another. Under this process, any change in any of the organisms that are involved in the interaction influences others evolution. Coevolution can happen in interactions such as between host and parasites, predators and prey and mutualism.