Which of the following is a characteristic of sea stars?
a. two stomachs
b. thin arms
c. suspension feeders
d. a notochord
a. two stomachs
Biology & Microbiology
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The purity of illicit drugs varies, so
a) drugs should be tested to ensure purity. b) some drugs may not harm the fetus. c) drug users can never be sure what they are ingesting. d) they do not pose risks to the fetus.
Biology & Microbiology
The number of protons in the nucleus of an atom is called the ________.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Actin filaments are anchored at junctions called
a. adherens junctions. b. tight junctions. c. desmosomes. d. gap junctions. e. hemidesmosomes.
Biology & Microbiology
What is the dominant vegetation of the savanna?
A) Trees that lose their leaves B) Cocoa C) Grasses D) Trees with waxy needles E) Lichens and scrub willows
Biology & Microbiology