Which process underlies the thigmotropic behavior of a green bean tendril?
A) rotation of the tendril in response to photoperiod
B) rotation of the tendril in response to a biological clock
C) extra proliferation of cells on the shaded side of the tendril
D) slower growth on the side where an object is touching the tendril
Answer: D
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A researcher is studying fairy shrimp in a desert pond that is also inhabited by spadefoot
toads. How many populations does this represent?
a. one b. two c. three d. four
The resulting cell from the union of a male animal sex cell and a female animal sex called is called a(n)
A. gamete. B. morula. C. polar body. D. zygote. E. oogonium.
The first vertebrates to be able to reproduce on land were the
A. amphibians. B. insects. C. reptiles. D. mammals.
Which statement describes a response of the human body to a need for increased energy?
A. slower breathing to increase the concentration of carbon dioxide in the blood B. faster breathing to increase the concentration of oxygen in the blood C. slower breathing to decrease the concentration of oxygen in the blood D. faster breathing to decrease the concentration of carbon dioxide in the blood