Organisms that obtain their energy from producers or other consumers are
A. heterotrophs.
B. autotrophs and producers.
C. producers.
D. heterotrophs and producers.
E. autotrophs.
A. heterotrophs.
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Basophils are white blood cells that defend the body against large parasites.
a. true b. false
Blood pressure is usually estimated from indirect measurements of the pressure in what structure?
A) left ventricle B) aorta C) femoral artery D) brachial artery E) radial artery
What must happen to amino acids before they can be used in catabolic reactions?
A. They must be dehydrogenated B. They must be deoxygenated C. They must be decarboxylated D. They must be deaminated
The major advantage provided to plants by root hairs is:
A) underground asexual reproduction. B) needle-like points for drilling through hard or rocky soil. C) ability to produce new taproots. D) greatly increasing absorptive surface area.