The legless condition that is observed in several groups of extant reptiles is the result of _____
A) their common ancestor having been legless
B) a shared adaptation to an arboreal (living in trees) lifestyle
C) several instances of the legless condition arising independently of each other
D) individual lizards adapting to a fossorial (living in burrows) lifestyle during their lifetimes
C
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Water "beads up" on synthetic fabric such as polyester but binds to cotton. What is the most likely explanation for this?
A. Polyester is more flexible than cotton. B. Polyester is not a naturally occurring substance, whereas cotton is a naturally occurring substance. C. Polyester fibers are thinner than cotton fibers. D. Polyester is nonpolar, whereas cotton is polar.
The activation of a prophage is called ________.
A. transformation B. lysogeny C. adsorption D. activation E. induction
You breed a black, long-haired rabbit with a white, short-haired rabbit. All of the offspring have long, black hair. If the genes for hair color and length are closely linked on the same chromosome, what would you expect to see in the F2 generation?
A. 3 black, long-haired: 9 black, short-haired: 9 white, long-haired: 1 white, short-haired B. 9 black, long-haired: 3 black, short-haired: 3 white, long-haired: 1 white, short-haired C. 3 black, long-haired: 1 white, short-haired D. 15 black, long-haired: 1 black, short-haired: 1 white, long-haired: 5 white, short-haired E. all long-haired black
The cell membranes of fungi contain (cholesterol/ergosterol/fatty acid) which is a target of some antifungal treatments.
Fill in the blank(s) with the appropriate word(s).