One of the major causes of the endangerment of giant pandas is ____
a. habitat loss and fragmentation
b. increasing the effects of chemical pollution
c. a sexually transmitted disease that plagues the giant pandas
d. introduced exotic species into giant panda habitat
e. the excess withdrawal of water from their habitat
ANSWER: a
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An important functional role of the endocrine system is to
a. provide mechanisms for rapid responses to changes in the body. b. allow for mechanisms to control gene action. c. inhibit nervous system action on muscles and glands. d. maintain a constant, yet dynamic internal fluid environment. e. fight infection.
All of the following are involved in the inflammatory response EXCEPT
A) antibodies. B) mast cells. C) histamine. D) basophils. E) phagocytes.
Water is the least dense when it ________
A) freezes B) is just above freezing C) is at room temperature D) is just below boiling
New gene variations are constantly being introduced into populations through random mutations.
Answer the following statement true (T) or false (F)