Those organisms that remain planktonic for their whole lives are called:
a. meroplankton.
b. holoplankton.
c. nanoplankton.
d. seston.
e. nekton.
B
You might also like to view...
A strain of penicillin-resistant N. gonorrhoeae that does not have a plasmid is isolated. A lysate made from the bacterium cannot degrade penicillin in an in vitro assay. When a culture of this strain is grown in a solution that contains radioactive penicillin, the amount of penicillin found within cells is less than the amount found within cells from a nonresistant strain. The DNA sequence of the porin gene from the resistant strain does not have any mutations. What is the most likely mechanism of resistance in this strain?
A) A mutation in the mtr gene has occurred, resulting in fewer efflux pumps. B) A penA nonsense mutation has occurred. C) A penA missense mutation has occurred. D) The bacterial genome carries the penr gene.
A branch of genomics that generates three-dimensional structures from their amino acid sequences is
_____________. A. bioinformatics D. pharmacogenomics B. comparative genomics E. proteomics C. structural genomics
Compare and contrast characteristics of amphibians and reptiles. Include morphological structures,
differences in reproduction, respiration, circulation, and their habitats. What will be an ideal response?
The following graph represents the concentration of cyclins over the course of the cell cycle. Which of the following statements is TRUE regarding the phase of the cell cycle where the blue arrow is pointing?
McGraw-Hill Education
A. At this point in the cycle the cell is determining if environmental conditions are favorable for growth and proliferation. B. At this point in the cell cycle, DNA has already been replicated and divided into two daughter nuclei. C. At this point in the cell cycle, chromosomes have properly aligned on the metaphase plate and are beginning to separate. D. At this point in the cycle the cell is continuing to grow and make abundant tubulin proteins. E. At this point in the cell cycle, the cell has determined that the DNA is intact, that environmental conditions are favorable, and it is preparing for DNA replication.