Currently the only predators of Galápagos marine iguanas are Galápagos hawks. Iguana body size is not correlated with risk of hawk predation, although small iguanas can sprint faster than large iguanas
If predators (for example, cats) that preferably catch and eat slower iguanas are introduced to the island, iguana body size is likely to _____ in the absence of other factors; the iguanas would then be under _____ selection. A) increase; directional
B) increase; disruptive
C) decrease; directional
D) decrease; disruptive
C
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Which of the following describes the function of veins in the body?
a. They are the sites for the exchange of nutrients, waste, and oxygen with tissues at the cellular level. b. They bring blood high in oxygen from the lungs to the rest of the body. c. They pump blood to the lungs for reoxygenation. d. They bring blood high in carbon dioxide back to the heart.
Which of the following statements is false
concerning X chromosome inactivation? a. It is an accident of evolution. b. It is an example of dosage compensation. c. It is a gene control mechanism. d. Normal development of female embryos depends on it. e. It does not occur in males.
The body of a cnidarian is supported by a(n) hydrostatic skeleton
____________________ Indicate whether the statement is true or false.
Territory marking is common in canids and felines.
Answer the following statement true (T) or false (F)