When a population of organisms is evolving, what can you be sure is happening?
A) It's improving.
B) It's stable (no change).
C) It's getting bigger.
D) It's changing.
D
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Examine Figure 41.1c. Which of the following best describes conditions at equilibrium?
A. No water molecules are moving across the barrier between the two compartments. B. A net movement of water molecules continues to add water to the right-hand compartment. C. A net movement of water molecules begins to add water to the left-hand compartment. D. Water molecules move randomly across the barrier with no net addition of water to either side. E. None of these choices accurately describe conditions at equilibrium.
When offspring are born from fertilized eggs that remain inside the female until they hatch, this is termed which of the following?
a. external fertilization b. oviparity c. ovoviparity d. viviparity
In __________ bonds, both atoms exert the same pull
on shared electrons. a. nonpolar covalent b. polar covalent c. double covalent d. triple covalent e. coordinate covalent
Ionizing radiation that can harm living cells does so by ____
a. creating chemical compounds b. lysing lysosomes c. removing electrons from atoms to create positive ions d. creating buffers e. destroying buffers