Which of the following questions is most appropriate to an investigation at the population level?
A) What is the effect of diminished resources on an individual's life span?
B) What is the relationship between resource availability and birthrate?
C) What factors influence the distribution of tropical forests?
D) How long does it take for carbon to be cycled from the atmosphere into living tissue?
B
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What would result if more than one sperm fertilized an egg?
A. hermaphroditism B. parthenogenesis C. polyploidy D. twins E. haploidy
Chronic hypertension is dangerous to a person’s health because ____
a. the pressure buildup can cause veins to rupture b. it can lead to damage to the endothelial cells lining the arteries and veins c. it makes the heart work too hard d. it tears capillaries e. the pressure diverts blood from the brain
Work by Charles Darwin and Francis Darwin was instrumental in the discovery of which type of plant
hormone?
a. auxins b. brassinosteroids c. jasmonates d. cytokinins e. gibberellins
A primary active transport process is one in which __________.
A. the plasma membrane folds inward to form a vesicle containing extracellular material B. an intracellular vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid C. molecules pass directly through the phospholipid bilayer of the plasma membrane D. molecules move through transport proteins that have been activated by ATP E. molecules move across the plasma membrane without an input of energy