The contents of the xylem sap in plant roots are:
A. the same as the solute composition of the
surrounding soil.
B. always high in sugars.
C. always higher in water than the
surrounding soil.
D. selectively maintained by endodermal
cells.
E. very acidic.
D
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The tissue that lines all internal surfaces is
a. epithelium. b. loose connective. c. supportive connective. d. fibrous. e. adipose
Which of the following paired terms are incorrectly matched?
a. classical conditioning?extinction b. habituation?relevant stimuli c. imprinting?behavioral bonding d. insight?trial and error e. operant conditioning?reward
Characteristics of an ideal antimicrobial include that it
A) is broadly toxic. B) is microbicidal. C) is allergenic. D) leads to antimicrobial resistance.
DNA replication is considered semiconservative because ____________________________
(a) after many rounds of DNA replication, the original DNA double helix is still intact. (b) each daughter DNA molecule consists of two new strands copied from the parent DNA molecule. (c) each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand. (d) new DNA strands must be copied from a DNA template.