A locus is ____
a. an alternate form of a gene
b. the chromosome location of the centromere
c. the location of a gene on a chromosome
d. a mutation of a gene to an alternate state
e. the site of crossing over
ANSWER: c
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Archaea use molecules with reactive side chains in their plasma membrane, so the tails of archaeal phospholipids form covalent bonds with one another. As a result, the plasma membrane is ____
a. more fluid b. less rigid c. less fluid d. able to contain more membrane proteins e. easily disturbed
With __________, an animal stops responding to an ongoing stimulus. Fill in the blank(s) with the appropriate word(s)
The dodo
a. is a large, flightless bird. b. became extinct at human hands. c. lived only on Mauritius. d. was plentiful in the year 1600. e. includes all of these descriptions.
Place the following in developmental order beginning with the earliest event
1) limb buds appear 2) face begins to look human 3) muscles differentiate 4) downy hair covers the fetus 5) sex can be determined by external inspection a. 3, 1, 2, 4, 5 b. 1, 3, 4, 2, 5 c. 1, 3, 2, 5, 4 d. 1, 2, 3, 4, 5 e. 1, 3, 5, 2, 4