During crossing over in meiosis, an unequal exchange of genetic material occurs. This would most likely produce
A. a deficiency in one homologue and a duplication in the other homologue.
B. a deficiency in both homologues.
C. a deficiency in one homologue and an inversion in the other homologue.
D. a reciprocal translocation.
E. a duplication in one homologue and an inversion in the other homologue.
A. a deficiency in one homologue and a duplication in the other homologue.
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Which cellular protein is found in tight junctions?
A) occludins B) tubulin C) connexons D) cadherins E) dynein
An antagonist to a receptor decreases the number of messengers bound to the receptor.
a. true b. false
A P. bursaria cell that has lost its zoochlorellae is aposymbiotic
If aposymbiotic cells have population growth rates the same as those of healthy, zoochlorella-containing P. bursaria in well-lit environments with plenty of prey items, then such an observation would be consistent with which type of relationship? A) parasitic B) commensalistic C) toxic D) mutualistic
Homologous structures, such as arms, wings, and fins, are constructed from the same basic bones and are adapted to locomotion in different environments. Which idea do such structures support?
a) inheritance of acquired traits b) descent with modification c) tendency toward perfection d) artificial selection