The _____ ______ is found outside the cell membrane in plants and bacteria and provides support and protection.
Fill in the blank(s) with the appropriate word(s).
Ans: cell wall
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In vertebrates, DNA methylation - the addition of a methyl group to DNA nucleotides - ensures that
A. the gene functions without interruption. B. no errors will be made during transcription. C. the nucleosome will quickly form, which assists in mRNA formation. D. once that gene is transcribed, the mRNA is saved and used over and over again. E. once a gene is turned off, it will remain off.
Essay on the Principle of Population, written by Thomas Malthus in 1798, influenced Darwin's thoughts as he struggled to understand what mechanisms could be at work to produce evolution. Malthus proposed that populations of animals and plants, including humans,
A. evolved from mainland to islands, thus explaining why the island flora and fauna resembled the mainland species so closely. B. decreased arithmetically in numbers while the nutrients available increased geometrically. C. increased arithmetically in numbers while the nutrients available only increased geometrically. D. increased geometrically in numbers while the nutrients available only increased arithmetically. E. increased geometrically in numbers while the nutrients available increased arithmetically.
Carbohydrates are composed of:
A. amino acids. B. fatty acids and glycerol. C. nucleotides. D. monosaccharides.
In female humans, what is the function of LH?
a. it stimulates the releases of GnRH from the adrenal cortex b. it stimulates the maturation of ovarian follicles c. it stimulates cells in the follicle to secrete estrogens d. it encourages the completion of meiosis I and cytoplasmic division e. LH functions to do more than one of these