The radula functions to:
a. filter feed.
b. assist in reproduction.
c. scrape algae off of rocks.
d. assist in osmoregulation.
e. secrete the shell.
C
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Figure 5-17 shows the approximate Km for the hydrolysis of ATP by helicase PcrA to be:
A. 3 µM. B. 5 µM. C. 10 µM. D. 15 µM. E. 20 µM.
Match the following names with the correct statements.
_______1. This German scientist proposed the theory of biogenesis—that life can arise only from preexisting life. _______2. This Dutchman built single lens microscopes as a hobby and is believed to be the first person to see live bacteria and protozoa. _______3. This German physician developed a step-by-step scientific method to prove that a particular microorganism causes a particular disease and contributed to what is known as “the germ theory of disease.” _______4. This French scientist discovered that microorganisms are responsible for fermentations, contributed to disproving abiogenesis, and contributed to what is known as “the germ theory of disease.” a. Robert Koch b. Louis Pasteur c. Rudolf Virchow d. Antony van Leeuwenhoek
Gastropods are the most numerous group of mollusks and include the ________
A) clams and oysters B) snails and slugs C) squid and octopi D) scallops and nautiluses
CAM and C4 plants likely grow in what type of environment?
A. in water B. cool C. high altitude D. hot and arid