Which of the following features is unique to the Class Aves?
a) hair
b) notochord
c) wings
d) shelled eggs
e) barbules
Answer: e) barbules
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Multiple independent experiments have demonstrated that phytochrome helps trigger seasonal change responses in the plant such as changing color and loosening of leaves. Plants have the ability adapt to seasonal changes in their surroundings. This statement is an example of:
A. a hypothesis B. deductive reasoning C. a theory D. an experiment E. inductive reasoning
Which of the following statements is true regarding the anterior pituitary gland? Select all correct choices
A. It houses neurosecretory cell axons B. It is derived from neural tissue C. It is the target of releasing factors D. It is derived from epithelial tissue E. It produces tropic hormones
In order to get around the lack of ability of prokaryotes to remove introns from precursor RNA, it may be necessary to
A. use the DNA directly. B. use the DNA after it has been processed. C. use different promoters. D. turn mRNA into cDNA. E. use the DNA directly AND use the DNA after it has been processed.
Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
a. lipids b. starches c. proteins d. steroids e. glucose