Root systems that are adapted to absorb water and nutrients from the upper layers of soil are called
a. adventitious root systems.
b. prop root systems.
c. fibrous root systems.
d. taproot systems.
e. storage root systems.
C
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For a temperate phage to produce more phage, which of the following must happen?
A. Lysogeny B. Lysogenic conversion C. Induction D. Prophage formation
In prokaryotes, which of the following types of regulation will NOT occur?
a. chromatin remodeling b. variations of mRNA turnover c. variations in protein turnover d. activation of promoters e. regulation of transcription
Gene flow
a. has a homogenizing influence on a population. b. speeds up the divergence of two populations. c. increases the genetic variation between populations. d. is promoted by isolating mechanisms. e. promotes inbreeding.
In humans, the genetic basis for determining the sex "male" is accomplished by the presence of ________
A) high levels of estrogen B) a balance between the number of X chromosomes and the number of haploid C) a portion of the Y chromosome D) multiple alleles scattered throughout the autosomes E) one X chromosome F) sets of autosomes