You observe two groups of freshwater fish that spawn at the same time of the year and in the same pond. After females lay their eggs on the pond bottom, males of both species attempt to fertilize them
After some investigation you realize that sperm from both species fertilize
the eggs, but embryonic development stops shortly after fertilization when the eggs are
fertilized by one species of males, but not by the other. This is an example of ______-zygotic
reproductive isolation between the two species.
A. pre
B. post
B
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Discuss the theory of secondary endosymbiosis and defend the theory by providing evidence that supports it
What will be an ideal response?
ATP is a good energy carrier because
1.of the presence of a 5 carbon sugar. 2.of the presence of a nitrogenous base. 3.the three phosphate groups repel each other. 4.it is very stable. 5.adenine is its nitrogenous base.
Which step produces the most ATP?
A) Glycolysis B) The Krebs cycle C) The ETC
A molecule that is a combination of two or more different elements in a fixed ration, is called a ___.
Fill in the blank(s) with the appropriate word(s).