In the history of human population growth, the earliest stage is referred to as the
a. agricultural phase.
b. technological phase.
c. hunting and gathering phase.
d. industrial phase.
e. prehistoric phase.
C
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Genetic variability in meiosis results from ____
a. recombination of homologous chromosomes only b. independent assortment of chromosomes only c. random joining of male and female gametes only d. recombination between sister chromatids and homologous chromosomes e. recombination of homologous chromosomes, independent assortment of chromosomes, and random joining of male and female gametes
Over the course of evolution, humans have obtained four Hox gene clusters due to duplication. The presence of multiple Hox gene clusters suggests what?
A) Only one of the clusters is silent since it would result in Drosophila development not vertebrate. B) Only two of the clusters are active and represent the added complexity of vertebrate development. C) Three of the four clusters are silent and have no effect on development. D) All four clusters are active and represent the added complexity of vertebrate development.
The __________ is the pelvic girdle, pectoral girdle,
and paired limbs.v
The application called multiple strand displacement amplification is a powerful tool because
A. it provides errorless sequencing results for that microorganism. B. it provides data on the pathogenic nature of the microorganism. C. it identifies the transcriptome of the microorganism. D. it allows single-cell genomic sequencing that can analyze uncultivated microorganisms.