You are told that the digestive tract of the animal you are studying developed an anus before a mouth. You realize that
you may be looking at a(n):
a. earthworm.
b. insect.
c. sponge.
d. clam.
e. cat.
e
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Acids are compounds that:
a. can bind hydrogen ions. b. can release hydrogen ions. c. are pH 8 or above. d. contain hydrogen and hydroxide ions equal in number. e. raise pH.
Cells with no nucleus
a. prokaryotic b. eukaryotic
Prions are created when normal proteins in the body ____
a. combine with large ribosomal subunit and become infectious
b. exchange several long sections of amino acids with other infected proteins c. refold into a different and infectious three-dimensional shape that kills cells in the brain and nervous system d. undergo mutation and create hundreds of copies of themselves e. invade the immune system, causing it to mistakenly destroy the body’s healthy tissue
Which term best describes an organism that has a minimum growth temperature of 6.5oC, an optimum temperature of 37oC and a maximum temperature of 46oC?
a. mesophile b. extremophile c. psycrotroph d. thermophile e. psychrophile