Which hormone induces male secondary sex characteristics and when used excessively could lead to overly aggressive behavior.
A. estradiol
B. progesterone
C. testosterone
D. cortisol
E. growth hormone
C. testosterone
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Whether an organism is classified as a photoheterotroph or a photoautotroph depends on its
A) energy source. B) carbon source. C) oxygen requirements. D) carbon and energy sources.
A heart murmur is caused by
A. a greater-than-normal force of contraction of the right atrium. B. a constriction of the pulmonary artery. C. blockage of the aorta. D. the heart valves not functioning properly. E. a greater-than-normal force of contraction of the left atrium.
In most deuterostomes, the mesoderm forms by:
a. duplication of the ectoderm. b. schizocoely. c. migration. d. enterocoely. e. blastocoely
Which of the following is likely to lead to a clumped population distribution?
A. population of animals dependent on rare resources. B. Small populations of widely dispersed plants. C. Large populations of widely dispersed plants. D. None of the above is correct.