A plant feeding insect species colonizes two different hosts, I and II, in the same habitat
Host preference is determined by a single locus, (A), and the ability to detoxify plant defensive compounds is determined by a second unlinked locus, (B). Genotypes A/A, and A/a prefer host I, whereas genotype a/a prefers host II. Genotypes B/B and B/b can detoxify compounds from host I but not II, whereas b/b can detoxify the com-pounds of host II but not of host I. Why may sexual reproduction come with a cost in this system?
a. The offspring of A/A;B/B individuals mating with a/a;b/b will suffer fitness consequences on host I.
b. A cross of A/a;B/b x A/a;B/b will produce A/A;b/b offspring.
c. Any mating of an A/a;B/B individual with a partner sharing the same host preference will result in offspring that is maladapted to either host.
d. A mating of an A/a;B/B individual with a partner sharing the same host preference can result in offspring that is maladapted to either host.
D
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The per capita growth rate of a population can be defined as
A. N. B. unchanging for a species. C. birth minus death. D. exponential growth. E. logistic growth.
Which is true about the RNA transcript?
A. It is formed using the DNA minus strand as a template. B. It has the same 5'-3' orientation as the DNA positive strand. C. It is made in short fragments that are then stitched together. D. The template starts at the promoter region. E. It is formed using the DNA minus strand as a template, it has the same 5'-3' orientation as the DNA positive strand, AND the template starts at the promoter region.
The structures that will exchange nutrients and
wastes with maternal blood are indicated by a. A. b. B. c. C. d. D. e. E.
Mesophyll tissue is part of the root system of a plant.
Answer the following statement true (T) or false (F)