Zero population growth is achieved
a. when a population reaches the carrying
capacity of the environment.
b. when emigration and immigration are
balanced, and the number of births equals
the number of deaths.
c. anytime that births exceed deaths.
d. anytime that deaths exceed births.
e. when emigration and immigration are
prevented.
B
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Some dinosaurs and birds share characteristics that make flight possible such as
A. a short tail. B. a horizontal back. C. an upright stance. D. All of the answer choices are correct. E. hollow bones.
What chemical causes death in many eukaryotes because it blocks cytochrome C oxidase?
A. Oxygen B. Iron C. Carbon monoxide D. Cyanide E. Copper
When a neuron is at rest,
a. there is a voltage difference across the membrane of about ?70 millivolts. b. the interior is positively charged. c. it is responding to a stimulus. d. the fluid outside the membrane has more sodium and less potassium than the cytoplasm. e. axons are firing at a faster rate.
Where does cellular respiration occur?
A) In the chloroplasts B) In the mitochondria C) In the nucleus D) In the airways of the respiratory system