Heterozygotes for the Tay-Sachs disease allele appear to have greater than normal resistance to _____________________, which supports the theory that _____________________ explains why this harmful allele persists in the gene pool
Fill in the blank(s) with correct word
tuberculosis; natural selection
Biology & Microbiology
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Calcium is a mineral that plays an important role in ____
a. producing thyroid hormone b. nerve function c. intercellular signaling d. supporting the hemoglobin molecule
e. maintaining the cell membrane
Biology & Microbiology
Of the following cancer stages, which one has the greatest potential for a positive outcome, including successful remission?
A. stage 2B breast cancer B. stage 3C breast cancer C. stage 1B breast cancer D. stage 1A breast cancer E. stage 4 breast cancer
Biology & Microbiology
In meiosis of oogenesis, how many mature eggs result?
A. 1 B. 2 C. 3 D. 4
Biology & Microbiology
The first hominin species associated with the use of tools was
A) Australopithecus robustus. B) Homo erectus. C) Homo habilis. D) Australopithecus afarensis. E) Homo sapiens.
Biology & Microbiology