Root hairs grow actively in which area of the developing roots?
A. Endodermis
B. Zone of cell division
C. Zone of maturation
D. Zone of elongation
E. Root cap
Answer: C
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Which of the following statements is consistent with the observation that the genetic code is nearly universal for all currently known life?
A. All organisms can reproduce with any other organism. B. All organisms have a common ancestor. C. All organisms have the same evolutionary genes. D. All organisms arose at the same time in the history of the earth.
Earthworms and slugs move by
A) contracting their cilia. B) contracting extensor and flexor muscles attached to their endoskeleton. C) alternating contractions of longitudinal and circular muscles. D) stretching their longitudinal muscles and contracting their circular muscles.
Turtle hatchling survivorship rate is low in many turtle species due to predation. Amanda researched the predatory rate on a species of turtle eggs in the Red River. The eggs were harvested from trapped turtles, and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. Research suggests that predators use the female's cloaca scent to locate the eggs.The eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. The nests were monitored by cameras and manually on foot, and data on nest predation was recorded.Based on the experimental design, what is the independent variable?
A. inducing egg laying B. time eggs spent in ground C. number of hatchlings D. no cloaca film on eggs
Some bacteria have been found to have much higher rates of mutation than other members of their population; they are termed "mutators." What do you think is the most likely reason for their higher rates of mutation?
A. They are incapable of bacterial transformation. B. Their DNA polymerase has compromised 5' to 3' polymerase function. C. All choices are equally likely to lead to higher rates of mutation. D. They have much smaller genomes than regular bacteria. E. Their DNA polymerase has compromised 3' to 5' exonuclease function.