Protists move by
A. flagella.
B. pseudopods.
C. cilia.
D. gliding mechanisms.
E. All the choices are correct.
Answer: E
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Synthetic plastics are
A) oxidized completely to carbon dioxide after a few years under aerobic conditions. B) partially degraded into branched chain and polyaromatic hydrocarbons. C) degraded slowly under anoxic conditions. D) extremely recalcitrant to microbial degradation.
Which morphological feature in lizards, mammals, and birds provides evidence of their descent from a shared
ancestor?
a. ribcages positioned right behind heads in the embryonic stage b. absence of limb buds in embryonic development c. presence of limb buds in embryonic development d. differences in limb structures in adults e. vestigial hindlimbs near the base of the tail in adults
The defining characteristic of a desert is the high temperature
Indicate whether the statement is true or false
Isotopes are atoms of the same element that differ in their:
A) number of protons. B) number of neutrons. C) number of electrons. D) ionic charge.