What is true about the normal flora that inhabit
our body surfaces?
a. most are harmful
b. they competitively exclude more harmful
species
c. some produce vitamin C
d. they become even more beneficial if they
invade tissues
e. all of these are true except that most are
harmful
B
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Barnacles such as Balanus are most common in the ____ zone of the rocky intertidal
a. upper midlittoral b. middle midlittoral c. lower midlittoral d. subtidal e. splash
The genotype of the parent at #1 is
a. Cc. b. cc. c. heterozygous. d. CC. e. hemizygous.
The enzyme that HIV uses to convert its RNA into DNA is
reverse transcriptase. DNA polymerase. RNA polymerase. RNA integrase. translase.
Choose the true statement(s) about the evolutionary divergence of horses in North America. Check all that apply.A) Most changes are seen as adaptations for life in grassland habitats.B) The general trends during horse evolution are increase in body size, lengthening of limbs, reduction of digits on both sets of limbs, and tooth development for a grazing life style.C) Horse evolution is unusual in that rates of change were uniform and constant throughout most lineages.D) Living lineages of horses show much less diversity than existed in the past.
What will be an ideal response?