Features that are useful for identification of fungal species include ________.
A. ability to produce chlorophyll a
B. presence of a membrane bound nucleus
C. size, shape color, and number of spores
D. All of the choices are correct.
Answer: C
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The switching between asexual and sexual reproduction by water fleas is controlled by ____
a. epistasis b. pleiotropy c. incomplete dominance d. codominant inheritance e. environmental effects
The protozoal disease known as (cutaneous/mucocutaneous/visceral) leishmaniasis is potentially fatal.
Fill in the blank(s) with the appropriate word(s).
How does the phenomenon of horizontal gene transfer muddle the concept of monophyletic groups?
A. Monophyletic groups are based on the concept that members of a particular group of species are related to one another at a particular taxonomic rank. However, a species that undergoes horizontal gene transfer no longer belongs to that taxon and the group becomes paraphyletic. B. Monophyletic groups are based on the concept that members of a particular group of species are related to one another at a particular taxonomic rank. An unrelated species that undergoes horizontal gene transfer can become more closely related to members of a different group, making that group polyphyletic. C. Monophyletic groups are based on the concept that a particular group of species descended from a common ancestor. When horizontal gene transfer occurs, not all of the genes in a species were inherited from the common ancestor. D. Monophyletic groups are based on the concept that a particular group of species descended from a common ancestor. When horizontal gene transfer occurs in the common ancestor, any species to which it gives rise can no longer be considered descendent species.
In a laboratory bacterial cell culture that has been infected by a virus, plaques are areas in which
a. bacterial cells are resistant to the virus and have not been infected. b. there is no nutrient available for the bacteria to grow. c. the virus has spread and left behind the remains of dead cells. d. the virus has not yet spread to that area of cells.