The area where the land meets the sea is know as the
1.Intertidal zone
2.Nearshore environment
3.Neritic zone
4.Photic zone
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The S cyclin-CDK complex:
A. controls the cell cycle during the S and G2 phases. B. triggers initiation of DNA synthesis during the S phase. C. prevents initiation of DNA synthesis a second time during the S and G2 phases. D. both controls the cell cycle during the S and G2 phases, and triggers initiation of DNA synthesis during the S phase. E. All of these choices are correct.
What is the selective advantage of a mature red blood cell being flat rather than a sphere?
A. It maximizes the relative surface area available to exchange gases. B. It provides more sites for the membrane-bound hemoglobin molecules which transport oxygen. C. It saves energy by making more membrane relative to the volume of the cell. D. It provides more membrane for the electron transport chains where oxygen is consumed. E. The cell's surface area to volume will decrease, making it easier for the cell to fit through arteries and veins.
Why are pea plants (Pisum sativum) a good species for genetics studies?
A. They have many distinctly identifiable forms of genetic traits.
B. They can be self-fertilized for true-breeding genetic traits.
C. They produce large numbers of offspring (the peas).
D. All of the answer choices are correct.
E. Growth of pea plants is simple and easy.
Recombinant DNA is any DNA that ____
a. has been cut by restriction enzymes b. is at least four to eight base pairs in length c. has had its gene sequence rearranged d. consists of DNA from two or more organisms of the same or different species e. inserted into plasmids