Why do vaccines help human health?
A. Vaccines stimulate the immune system to remember a virus for an extended period of time.
B. Vaccines stimulate the immune system to recognize a virus faster if encountered.
C. Vaccines stimulate the immune system to destroy a virus more effectively if encountered.
D. All of the above are reasons why vaccines help human health.
Answer: D
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A plant wilts when ____
a. the soil water becomes hypotonic with respect to the cytoplasm b. the soil water becomes hypertonic with respect to the cytoplasm c. the turgor inside the cell increases d. the turgor in the soil disappears e. osmotic pressure is equal to the turgor pressure
Refer to Figure 26-3. At point 4, several Chlamydomonas cells are “packaged” in a surrounding membrane. Which of the following statements concerning those cells is FALSE?
a. They are gametes.
b. They were produced by mitosis.
c. They are part of the negative (?) strain.
d. They are part of the haploid generation.
e. They can also be considered zoospores
Which of the following traits is NOT found in both fungi and animals?
A. multicellular B. consumers C. heterotrophic D. saprotrophic
What structure in the mammalian brain is enlarged and is responsible for higher mental processes?
A. cerebellum B. cerebrum C. midbrain D. forebrain E. hindbrain