Question 29 of 32 Why do the plant cells in these two images have different structures?
A. Because every plant cell has a different structure
B. Because they are in different stages of development
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C. Because they have different jobs, or functions
D. Because the DNA in their nuclei are very different

Dna and rna share a number of similarities, but they also differ in certain aspects of their structure. wich nitrogenous base is found in rna but is not found in dna

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which of the following shows the results that you would get if you tested beef using the four tests in the gizmo