The chromosome number in human body cells is
a. 23.
b. 39.
c. 46.
d. 69.
e. variable depending on the cell.
C
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The movement of substances from higher to lower concentration across a semipermeable membrane via a specific protein carrier but without energy expenditure is called ________.
A. active transport B. endocytosis C. facilitated diffusion D. diffusion E. osmosis
How does losing or acquiring territory affect the brain anatomy and chemistry of an African cichlid fish?
a. only the size of the brain is changed b. only the shape of brain is changed c. both the size and shape of the brain are changed d. the size of brain cells producing sex hormones are changed e. the size of brain cells producing territorial hormone are changed
Which of the following are a class of immunoglobin? (Check all that apply.)
_____ IgA _____ IgB _____ IgC _____ IgD _____ IgE _____ IgG _____ IgM
A ball sitting on a table top has ________ energy because of its position.
Fill in the blank(s) with the appropriate word(s).