One out of every 800 to 1000 infants born will have three copies of chromosome 21 (trisomy 21), a condition known as ________
Fill in the blank(s) with correct word
Down syndrome
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Darwin’s experiments on phototropism illustrated that ____
a. plant stems bend away from bright lights b. signals from plant roots control phototropism c. an opaque cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth d. a translucent cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth e. a translucent cap placed over a shoot tip will cause a plant to both grow and bend toward light
Collagens commonly contain the three repeating amino acids: _______, proline, and _______.
a. glutamine; hydroxyproline b. glycine; hydroxyproline c. glycine; hydroxylysine d. glutamine; hydroxylysine
Lysogenic viral DNA integrating into the host genome is referred to as
a. lysogeny. b. induction. c. a prophage. d. lytic.
When a population is in a neutral equilibrium, a small change causes the population to:
a. return to its starting position. b. move farther away from its starting point. c. remains at its displaced position. d. A and B. e. A and C.