The base of the food web of deep-sea vent communities are:
a. chemosynthetic bacteria.
b. cyanobacteria.
c. dinoflagellates.
d. deep-sea algae.
e. benthic diatoms.
A
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The degradation of mRNA in the cells occurs in clusters known as
A) iRNA sites. B) sRNA regions. C) nuceoli. D) P bodies. E) N sites.
The regulatory protein
A. binds to the promoter region of DNA. B. may inhibit or enhance transcription. C. may control translation of the operon. D. affects the activity of the DNA polymerase. E. binds to the promoter region of DNA AND affects the activity of the DNA polymerase.
The difference between vertical and horizontal transmission of plant viruses is that vertical transmission is _____
A) transmission of a virus from a parent plant to its progeny, and horizontal transmission is one plant spreading the virus to another plant B) the spread of viruses from upper leaves to lower leaves of the plant, and horizontal transmission is the spread of a virus among leaves at the same general level C) the spread of viruses from trees and tall plants to bushes and other smaller plants, and horizontal transmission is the spread of viruses among plants of similar size D) the transfer of DNA from a plant of one species to a plant of a different species, and horizontal transmission is the spread of viruses among plants of the same species
_______ hypothesized that speciation occurred gradually over time.
What will be an ideal response?