Pili are bacterial structures used primarily for motility.
a. true
b. false
Answer: b. false
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Bioassays can be used to
(a) test new drugs. (b) determine the effectiveness of new fertilizers and herbicides. (c) measure the effects their waste discharges have on aquatic organisms. (d) do all of these choices.
Earthworms have a(n) ____
a. exoskeleton b. endoskeleton c. hydrostatic skeleton d. segmental skeleton e. squishy skeleton
The parietal lobe is responsible for ____
a. vision b. sensory input c. hearing d. generating a motor response e. inhibiting unsuitable behaviors
Which of the following statements about transgenic plants is CORRECT?
a) Transgenic plants require many years to be produced. b) Intermediate species are required for transgenic plants to be produced. c) Transgenic plants have been shown to have no detrimental effect on the environment. d) Transgenic plants contain genes from more than one species. e) Transgenic plants have been used successfully for insect resistance but not herbicide resistance.