According to the fossil record, which of the following were common among ancient land plants?
a. fungal infections
b. haustoria
c. arbuscular mycorrhizae
d. ectomycorrhizae
Ans: c. arbuscular mycorrhizae
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The type of reproductive isolation in which offspring are infertile because their chromosomes cannot align correctly during meiosis because of a different number of chromosomes being inherited from the two parents is
A. gametic isolation. B. mechanical isolation. C. hybrid infertility. D. hybrid inviability. E. temporal isolation.
Aerobic respiration is classified as:
a. a synthesis reaction. b. a hydrolysis reaction. c. a redox process. d. a polymerization reaction. e. an anabolic process
An example of ligand-gated ion channels is _____
A) the spreading of action potentials in the heart B) acetylcholine receptors at the neuromuscular junction C) cAMP-dependent protein kinases D) action potentials on the axon
The Monterey pine and the Bishop's pine inhabit some of the same areas of central California. The Monterey pine releases pollen in February, while the Bishop's pine does so in April. This is an example of ________ isolation
A) postzygotic B) temporal C) habitat D) mechanical