Which of the following organisms possesses a brain?
A. squid
B. flatworm
C. earthworm
D. both squid and earthworm
D
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The long, thread-like branching cells of molds are called ________.
A. hyphae B. septa C. pseudohyphae D. conidiophores E. asci
Marc Spehr and his colleagues demonstrated that ____
a. sperm cannot detect and swim toward attractant molecules b. sperm can detect and swim toward attractant molecules c. eggs release chemicals that attract sperm d. sperm attraction can be inhibited by chemicals e. sperm can release chemicals that kill other sperm
Which of the following choices represents an informal grouping of anaerobic chemoautotrophs that form ATP by removing electrons from hydrogen gas or acetate?
a. extreme thermophiles b. extreme halophiles c. acidophiles d. methanogens
Which molecule stores energy for just a short period of time?
A) Protein B) Phospholipids C) Glycogen D) Steroids E) ATP