Recent research has indicated that for human _____, vocal pitch changes may be associated with fertility
a. males
b. females
c. males and females
d. females during menopause
e. males during puberty
ANSWER: b
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You smell a flower that is giving off a horrible smell of rotting meat. This flower is most likely pollinated by a _____________
A. bird B. bat C. beetle D. rodent E. bee
Why do scientists hypothesize that RNA was the first form of genetic material?
A. RNA can store genetic information and form membranes. B. RNA can store genetic information. C. RNA can catalyze reactions. D. RNA can catalyze reactions and store genetic information. E. RNA can catalyze reactions and form membranes.
In a hypothetical population of 1,000 people, there is a hypothetical trait called pink toe. People who are homozygous dominant have red toes, those who are homozygous recessive have white toes, and those who are heterozygous have pink
toes. If 400 people have red toes, the number of people with pink toes is _____________________. Fill in the blank(s) with the appropriate word(s).
An essential amino acid is one that must be provided in the diet
____________________ Indicate whether the statement is true or false.