Which of the following biological groups has the fewest members:

(1) Species

(2) Genus

(3) Family

(4) Class

What structures carry the most genetic information for a leaf cell:

(1) chromosomes

(2) ribosomes

(3) centrioles

(4)  chloroplasts

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BOTW Plants
Berkeley - Plant Photos

A karyotype would be least useful in determining whether a person had:

(1) a missing 23rd chromosome

(2) more than one X chromosome

(3) a recessive gene on the Y chromosome

(4) an extra copy of chromosome 21

Areas with a vast amount of varied niches will invariably contain:

(1) great diversity among the organisms

(2) little diversity among the organisms

(3) no organisms that risk extinction

(4) large numbers of organisms that risk extinction

When a duck dives into cold water, the capillaries in its skin constrict and move deeper below the surface of the skin. This reaction is an example of:

(1) homeostasis

(2) synthesis

(3) respiration

(4) excretion

An organism with chitinous appendages and Malpighian tubules most likely eliminates carbon dioxide through:

(a) spiracles

(b) tentacles

(c) antennae

(d) nepbridia

The amino acids in the amino acid sequences of the polypeptide chains of human proteins differ from those of chimpanzees by approximately what percentage?

(1) 1%
(2) 8%
(3) 20%
(4) 30%
(5) 45%

People with cystic fibrosis inherit defective genetic information and can not produce normal CFTR proteins.  Scientists have used gene therapy to insert normal DNA segments that code for the missing CFTR protein into the lung cells of people with cystic fibrosis.  Which statement does not describe a result of this therapy?

(a) Altered lung cells can produce the normal CFTR protein.
(b) Altered lung cells can divide to produce other lungs cells with the normal CFTR gene.
(c) The normal CFTR gene may be expressed in altered lung cells.
(d) Offspring of someone with altered lung cells will inherit the normal CFTR gene.