In sweet peas, genes C and P are necessary for colored flowers. In the absence of either (__ pp or cc
__) or both (cc pp), the flowers are white. What will be the color of the offspring of the crosses listed
below and in what proportions?
(a) Cc Pp ? cc pp
(b) Cc Pp ? Cc Pp
(c) Cc PP ? Cc pp
(d) Cc pp ? cc Pp What will be an ideal response?
(a) 1/4 color, 3/4 white
(b) 9/16 color, 7/16 white
(c) 3/4 color, 1/4 white
(d) 1/4 color, 3/4 white
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Your friend is an amateur aquarist learning to breed clownfish. She had one successful clutch of eggs, and moved the mother and fry with their anemone to a separate tank leaving only male fish behind. Now, she is surprised to find that a new female fish has appeared in the original tank. What is the most likely explanation for this?
A. Some anemone species secrete pheromones that control the sex of fish as a way to regulate predation. Removal of the anemone allowed a new female to develop. B. In urban areas, tap water is polluted with contamination from endocrine disruptors such as BPA and PCBs. When she removed some of the tank water for the new tank, she should have replaced it with bottled water. C. Clownfish are protandrous hermaphrodites that respond to social cues. Removal of the dominant female allowed the second-largest fish to transform into a female. D. Clownfish synchronize their mating based on seasonal cues indicated by salinity. When she replaced some of the tank water, the lower salinity caused the fish to change into a female. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the reproductive modes of fish? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
An enzyme that catalyzes the movement of DNA transposons
Match the description with the appropriate term.
A response that is uniquely directed against pathogenic Bordetella pertussis would involve what component?
a. Skin barrier b. The complement system c. Antibodies d. Inflammation
Which statement reflects the correct order in the synthesis of triacylglycerol?
A. Glycerol 3-phosphate ? diacylglycerol ? phosphatidic acid ? dihydroxyacetone phosphate ? triacylglycerol B. Diacylglycerol ? glycerol 3-phosphate ? phosphatidic acid ? dihydroxyacetone phosphate ? triacylglycerol C. Dihydroxyacetone phosphate ? glycerol 3-phosphate ? phosphatidic acid ? diacylglycerol ? triacylglycerol D. Phosphatidic acid ? glycerol 3-phosphate ? dihydroxyacetone phosphate ? diacylglycerol ? triacylglycerol