The ultimate source(s) of energy, on which all living organisms depend, is(are) __________
a. the sun
b. autotrophs
c. primary producers
d. the first trophic level
A
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Which of the following is/are NOT a degradation product of organic material?
A) carbon dioxide B) methane C) oxygen D) carbon dioxide, methane, and oxygen
Inversions are most likely to affect an organism's phenotype
A) if one or both of the inversion's breakpoints lies within the transcribed region of a gene. B) if the inversion's breakpoints are on either side of a gene and its regulatory regions and the entire gene is reversed in the genome. C) if the inversion is pericentric. D) if the inversion is paracentric. E) if the inversion is small.
The function of the epididymis is to:
a. secrete an alkaline fluid that neutralizes the acids of the vagina. b. produce a nutritive fluid for the sperm. c. provide a place for maturation and storage of sperm. d. secrete mucus that lubricates the penis. e. maintain sperm at a low body temperature.
The thick filaments of sarcomeres are composed of _____.
A. myofibrils B. actin C. motor neurons D. myosin E. Z lines