When a population decreases in number until a small remnant of the original population remains, a ________ has occurred
Fill in the blank(s) with correct word
bottleneck
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With regard to mitochondrial DNA:
A. Each mitochondrion has only one, circular DNA. B. The mitochondrial DNA molecule of animals is larger than that of plants. C. Each mitochondrion has multiple, circular DNAs. D. The nucleic acid in mitochondria is actually RNA. E. Mitochondrial DNA codes for 95% of the proteins needed in the mitochondria.
The morphology of plants is determined
A. by cell division at the tip of the shoots and cell elongation at the tip of the roots B. by cell division at the tip of the roots and cell elongation at the tip of the shoots C. by cell elongation at both the tip of the shoots and the roots D. by cell death (apoptosis) along the radial axis E. by cell division at both the tip of the shoots and the roots
Which of the following statements concerning saliva is false?
a. Saliva moistens food. b. Saliva is secreted by three pairs of salivary glands. c. Saliva dissolves food so it can be tasted. d. Saliva starts the enzymatic digestion of lipids. e. Saliva starts the enzymatic digestion of starch.
Consider the following reaction at equilibrium: What would be the effect of adding additional H2CO3?
A) It would drive the equilibrium dynamics to the right. B) It would drive the equilibrium dynamics to the left. C) Nothing would happen, because the reactants and products are in equilibrium. D) The amounts of CO2 and H2O would decrease.