Which of the following occurs during
metamorphosis?
a. remodeling of tissues.
b. juveniles become adults.
c. changes in lifestyle.
d. changes in body form.
e. all of the above.
Answer: e
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What is the primary characteristic of all animals in the phylum Arthropoda?
a. jointed appendages b. incomplete digestive systems c. asexual reproduction d. pseudocoelomic body cavities
Complementary relationships between purines and pyrimidines
A) allow adenine to form two hydrogen bonds with thymine (or uracil) and guanine to form three hydrogen bonds with cytosine to form double-stranded nucleic acids. B) allow the interaction of the oppositely charged amino acids to form the tertiary structure of proteins. C) allow adjacent bases in a nucleotide chain to stack tightly, stabilizing the DNA double helix. D) provide highly ordered, repetitive bonding to form ? helices and ? sheets within proteins. E) Both A and C are correct.
A dissolved substance in water is a(n)____
a. solvent b. solute c. antioxidant d. free radical e. acid
Probes used for detecting genetic sequences are frequently composed of
A) agarose. B) synthetic nucleic acids and labeled conjugates, such as fluorescent dyes. C) restriction enzymes. D) silicon chips. E) nitrocellulose.