Genes that are close together on a single chromosome are considered to be
A.) homozygous.
B.) linked.
C.) independent.
D.) alleles.
Ans: B.) linked.
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Which of the following are purine nitrogenous bases?
A) cytosine and guanine B) guanine and adenine C) adenine and thymine D) thymine and uracil E) uracil and cytosine
There are several reasons bacterial groupings based on morphology, physiology, and other metabolic characteristics may not be supported by molecular phylogenies produced from rRNA genes
Consider the statements below as possible reasons for this discrepancy. Obtaining the traditional groupings of bacteria requires sequencing and comparing the entire genome of each organism and cannot rely on single gene phylogenies generated from 16S rRNA datasets. A. true B. false
Which of the following is the most important contribution of molecular phylogenetics?
a. the discovery of rRNA b. the reanalysis of the morphology of Amborella trichopoda c. the reorganization of living systems from five to six Kingdoms d. the reorganization of living systems into three domains e. the realization that morphological characters are not representative of phylogenetic relationships
Which of the following is false regarding plant
hormones? a. They are signaling molecules that travel to target cells. b. They stimulate or inhibit gene activity. c. They bind to receptors on their target cells. d. Target cells are always adjacent to the secreting cell. e. All of these are false.