A pine tree is

a. a sporophyte.
b. a gametophyte.
c. diploid.
d. both a and c.


d

Biology & Microbiology

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In DNA, the pyrimidines are ____

a. thymine and cytosine b. adenine and cytosine c. adenine and guanine d. thymine and adenine e. guanine and thymine

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Which of the following pairs indicates the closest

macroevolutionary link among the plants according to the evolutionary history tree in the text? a. lycophytes; ferns b. whisk ferns; horsetails c. lycophytes; mosses d. hornworts; horsetails e. ferns; ginkgos

Biology & Microbiology

The integration site for sensory and motor information in humans is the

A. basal nuclei. B. cerebellum. C. thalamus. D. cerebral cortex. E. hippocampus.

Biology & Microbiology

According to the concept of punctuated equilibrium, _____

A) natural selection is unimportant as a mechanism of evolution B) given enough time, most existing species will gradually give rise to new species C) a new species accumulates most of its unique features as it comes into existence D) evolution of new species features long periods during which changes are occurring, interspersed with short periods of equilibrium, or stasis

Biology & Microbiology