Amino acids are the building blocks for
a. proteins.
b. carbohydrates.
c. lipids.
d. nucleic acids.
e. most macromolecules.
Answer: a
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Most life on Earth depends, directly or indirectly, on a process that combines water and carbon dioxide
to make carbon-based compounds. This process is called
a. aerobic respiration. b. decomposition. c. photosynthesis. d. anaerobic respiration. e. fermentation.
Early microscopes did not allow clear visualization of cells because they were limited by
A) magnification. B) number of kernels. C) resolution. D) refraction. E) both magnification and resolution.
A simple reflex consists of the effects of a stimulus on a ______that causes transmission of a message through parts of the _____ system and leads to an _____ response by an effector.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements concerning Toxoplasma infection is CORRECT?
A) It is a rare infection. B) It is transmitted by biting insects. C) It is typically contracted by eating undercooked meat. D) Freshwater snails are intermediate hosts. E) In most individuals, the infection results in lasting damage to the heart.