Grouped by some with the fungi based on molecular studies, these single-celled parasites are known to
infect insects, fish, and humans (especially those with compromised immune systems). They
physically resemble spores, but they lack mitochondria.
a. amoebae
b. red algae
c. microsporidia
d. dinoflagellates
e. apicomplexans
C
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Observe the figure below. Can you make any conclusions about the spreading of zebra
mussels throughout the country?
Excerpt from Figure 14.8
The accompanying figure represents which chromosomal change?
A. Inversion B. Deletion C. Duplication D. Translocation E. Aneuploidy
In both field and lab studies of guppies, you observe a rapid evolutionary change in the physiological traits that help the animals avoid predation. This observation illustrates which main points? (Select all that apply.)A) Allele frequency is maintained in all conditions.B) Natural selection is an ongoing process.C) Dominant genes will always increase survival rates.D) Evolutionary change is facilitated by natural selection.
What will be an ideal response?
Aphids are small insects that insert their mouthparts into a plant to obtain phloem sap. Which would be the best way to determine if aphids must actively draw phloem sap into their digestive tract or if hydrostatic pressure in the phloem tube could force
the sap into them? A) Isolate a phloem tube from a plant, allow an aphid to insert its mouthparts, and see if the aphid can still take up sap from it. B) Measure relative rates of sugar manufacture in leaves with and without aphids. C) Insert mouthparts removed from an aphid, without including the digestive tract, into phloem sap and see if sap keeps flowing through them.