When the ring-necked pheasant was introduced from China to the United States, it increased in population, stabilized, and did not appear to cause any detrimental effects on the populations of any of the plants or animals in the regions in the Midwest where it lives. Therefore, it probably
a. filled a realized niche previously occupied by another bird.
b. filled a fundamental niche previously not occupied.
c. experienced extensive competitive exclusion.
d. experienced density-dependent limiting factors.
e. experienced extreme density-independent limiting factors.
B
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A phylogenetic species comprises ____
a. populations that share a recent evolutionary history b. individuals that share a recent evolutionary history c. interbreeding populations that are reproductively isolated d. individuals that share measurable traits that distinguish them e. one large gene pool subdivided into local populations
Which of these macromolecules are modified within the rough endoplasmic reticulum?
a. carbohydrates b. lipids c. proteins d. steroid hormones
Which of the following did Mendel confirm with reciprocal crosses that generated an identical F 1 and F 2 offspring ratio of 3:1?
a. Traits are inherited independently. b. Dominant and recessive traits are blended. c. Recessive traits disappear at every cross. d. First-generation crosses produce hybrids.
Identify and briefly describe three biogeographical realms as described by Wallace. What will be an ideal response?