Diatoms are mostly asexual members of the phytoplankton. Diatoms lack any organelles that might have the 9 + 2 pattern. They obtain their nutrition from functional chloroplasts, and each diatom is encased within two porous, glasslike valves
Which question would be most important for one interested in the day-to-day survival of individual diatoms? A) How do diatoms get transported from one location on the water's surface layers to another location on the surface?
B) How do diatoms with their glasslike valves keep from sinking into poorly lit waters?
C) How do diatoms with their glasslike valves avoid being shattered by the action of waves?
D) How do diatom sperm cells locate diatom egg cells?
B
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aromatic chemicals to deter plant eating insects. What do these structures secrete from the cannabis plant? a. THC b. hydrogen peroxide c. latex d. phloem fluid e. sharp edged crystals
Which of the following statements about taste is false?
a. Taste receptors activate second messengers in the signal transduction process. b. Genetics play a role in determining what a person tastes. c. Taste receptors only detect chemicals that have been dissolved in saliva. d. Smell affects flavor because odors pass from the mouth to the nasal cavity. e. If taste receptors are damaged, they are incapable of regeneration
On what basis does gel electrophoresis separate DNA segments?
A) weight B) length C) types of nucleotides D) complexity
In some plants, roots may arise along the stem. These are called ________.
Fill in the blank(s) with the appropriate word(s).