Mucins in saliva are used to
a. digest starch.
b. digest fats.
c. digest proteins.
d. bind food together to from a bolus.
e. maintain the pH of the mouth.
D
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The value for ? in root tissue was found to be -0.15 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (? = -0.23 MPa), the net water flow would _____
A) be from the tissue into the sucrose solution B) be from the sucrose solution into the tissue C) be in both directions and the concentration of water would remain equal D) occur only as ATP was hydrolyzed in the tissue E) be impossible to determine from the values given here
The sympathetic nervous system is part of the
A. central nervous system. B. autonomic nervous system. C. somatic nervous system. D. learning and memory system. E. limbic system in the brain mediating emotion.
The specialized reproductive structures of sac fungi are called
A) mycelia. B) asci. C) toadstools. D) basidia. E) zygospores.
In the late 1990s, what important discovery in genetics was made?
a. The three-dimensional structure of DNA was described, which showed how DNA might be replicated. b. The first recombinant DNA experiments were performed that started the biotechnology field. c. DNA sequencing methods were first discovered. d. Genes were found to be located on chromosomes. e. Tiny RNAs were discovered that play important roles in the regulation of gene expression.