The kidneys are important homeostatic organs, contributing to maintenance of all of the following except

A. blood pressure.
B. blood volume.
C. blood pH.
D. destruction of worn-out red blood cells.
E. ion concentration of extracellular fluids.


Answer: D

Biology & Microbiology

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The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

____. a. 0% b. 25% c. 50% d. 75% e. 100%

Biology & Microbiology

An element is

a. a pure substance that can be broken down to another substance. d. an atom with an unstable nucleus. b. a pure substance that cannot be broken down to another substance. e. an atom with positive electrons. c. the smallest unit that has properties of a given element.

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What are Hox and MADS genes, and what do they have in common?

What will be an ideal response?

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Which of the following inheritance patterns is matched with an inaccurate molecular basis?

A. Sex-influenced: Hormones alter the expression of proteins encoded by dominant and recessive alleles. B. Incomplete dominance: The protein produced by a wild-type allele affects the phenotype in a concentration-dependent manner. C. Simple Mendelian inheritance: The protein produced by a single allele cannot produce the dominant phenotype. D. X-linked: Hemizygotes with the recessive allele do not make a functional protein, but heterozygotes do. E. Codominance: Two proteins are produced in heterozygotes.

Biology & Microbiology