The cells within a morula are referred to as ____
a. stem cells
b. endoderm
c. ectoderm
d. blastomeres
e. mesoderm
ANSWER: d
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Alcoholic fermentation is the basis for
(a) bread baking. (b) beer brewing. (c) ethanol fuel production. (d) all of the above.
Which of the following is(are) true about the DNA of a zebrafish that glows in the dark
because its DNA contains and expresses the firefly gene for bioluminescence?
a. It has recombinant DNA. b. Its DNA has mutated. c. It has evolved. d. The DNA contains a bacterial plasmid.
You have arrived home and you flip on a light switch. The light does not come on. You immediately wonder why. Which step of the scientific method is this?
a. Form a hypothesis. b. Make a prediction. c. Make an observation. d. Analyze the results.
Which of the following is NOT part of the bark
of a tree?
a. secondary phloem b. secondary xylem c. cork cambium d. periderm e. more than one of these is NOT part of the bark of a tree