If harboring large populations of cycliophorans neither helps nor harms their lobster hosts, then cycliophorans can be properly considered to be _____. 1. parasites 2. mutualists 3. commensals 4. symbionts 5. endosymbionts
A) 1 and 4
B) 3 and 4
C) 2 and 5
D) 3 and 5
B
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Endotherms usually, but don't always, maintain a _____ body temperature that is _____ than that of the environment
A. constant; higher B. constant; lower C. constant; identical to D. fluctuating; higher E. fluctuating; identical to
__________ and __________ are single-celled
heterotrophs with a secreted shell. Fill in the blank(s) with the appropriate word(s).
Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Some sensory receptors do not convert a stimulus to nerve impulses. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.
Four of the five answers listed below are chromosomal abnormalities. Select the exception
a. translocation b. elongation c. duplication d. deletion e. inversion