Which of the following is NOT an important feature in distinguishing animals from each other?
a. presence and cellular arrangement of tissues
b. growth of skeletal elements
c. body symmetry
d. development of the gut
e. method of locomotion (movement)
Ans: e. method of locomotion (movement)
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A chromosomal mutation where a segment lacking a centromere breaks off is called a deletion
A. true B. false
The statement, "Energy is neither created nor destroyed," describes
A) the first law of thermodynamics. B) the second law of thermodynamics. C) the law of conservation of energy. D) enthalpy. E) both choices A and C
According to W. W. Rostow's model of economic development, in order for a country to be ready for "take-off" it must have
A) an investment in manufacturing equal or greater than 10 percent of national income. B) a physical infrastructure and a social/political elite. C) comparative advantages in international trade, which it exploits. D) a majority of the population engaged in tertiary activities. E) a democratic form of government.
The optimum pH for growth of most species of bacteria is
A. pH 5. B. pH 7. C. pH 9. D. pH 6.