____ is one of the substances that maintains our blood pH between 7.35 and 7.45
a. Water
b. Carbonic acid
c. Hydrochloric acid
d. Hydrogen peroxide
e. Sodium hydroxide
ANSWER: b
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Which of the following is true regarding diffusion?
a. The larger the solute, the faster diffusion will occur. b. The colder the temperature, the faster diffusion will occur. c. The fewer solute particles in a solution, the faster diffusion will occur. d. The less dense a solvent is, the faster diffusion will occur.
Oxidation means
A. the gain of oxygen by a cell. B. the loss of electrons from a molecule. C. the gain of electrons by a molecule. D. the loss of oxygen and an electron. E. the loss of oxygen by a cell.
Two organisms, AABBCCDDEE and aabbccddee, are mated to produce an F1 that is self-fertilized
If the capital letters represent dominant, independently assorting alleles: (a) How many different genotypes will occur in the F2? (b) What proportion of the F2 genotypes will be recessive for all five loci? (c) Would you change your answers to part (a) and/or part (b) if the initial cross occurred between AAbbCCddee × aaBBccDDEE parents? (d) Would you change your answers to part (a) and/or part (b) if the initial cross occurred between AABBCCDDEE × aabbccddEE parents?
DNA is composed of repeating units of sugars, phosphates, and nucleic acids. This is an example of a
A. polymer. B. monomer. C. salt. D. micelle. E. lipid.