Why is the productivity poor in the deeper parts of the ocean?
What will be an ideal response?
ANSWER: In the deeper parts of the ocean, sunlight only influences the activities happening near the
surface since the sunlight does not penetrate deep into the water. In addition, many nutrients
sink to the bottom of the ocean. This impacts productivity greatly since both sunlight and
nutrients are necessary to improve the productivity.
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Polyploidy can result when
A) a translocation occurs between two chromosomes. B) one pair of homologous chromosomes does not separate during meiosis. C) a developing gamete is haploid. D) a haploid sperm fertilizes a diploid egg.
The process that probably accounts for most changes in the mix of alleles in a gene pool is
a. cloning. b. mitosis. c. meiosis. d. natural selection. e. genetic drift
Translational controls of protein levels in bacteria are governed by:
a. the rate at which small and large subunits of ribosomes assemble. b. the rate at which the cap and tail of pre mRNA are removed. c. the rate at which ribosomes attach to mRNA molecules. d. the concentration of proteins in the cytoplasm. e. the rate at which sugars are incorporated into the cell.
Earth formed___years ago, and life first appeared about___years ago
Fill in the blank(s) with the appropriate word(s).