Certain orchids produce flowers and secrete scents that resemble female bees so that male bees will mount these
flowers and attempt to copulate with them. This bizarre occurrence is an example of:
a. fertilization.
b. coevolution.
c. apomixis.
d. self-pollination.
e. asexual reproduction.
b
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Which of the following is a process that is unique to (or only found in) humans?
A. culture B. language C. conciousness D. All of a-c are unique to humans. E. None of a-c are unique to humans.
Some members of the species D. bifasciata produce mostly female offspring if reared at or below 21°C. The causative agent of this condition (called sex ratio) is a protozoan infection that is lethal to most male larvae
How can you demonstrate that it is both inherited and extrachromosomal? A) Inject ooplasm of affected females into normal females and then mate these with normal males. B) Inject cytoplasm from somatic cells of an affected female into normal females and then mate them with normal males. C) Mate affected females with normal males and assess daughter somatic cells for presence of the protozoan. D) Perform reciprocal crosses of affected and normal individuals and examine the offspring for infection. E) Perform reciprocal crosses of affected and normal individuals and look for affected male offspring.
Describe the action of the enzyme transposase
What will be an ideal response?
Sharks differ from most other fish in that they lack ____.
A. gill slits B. scales C. bone D. paired appendages E. teeth