Mutations are important to the evolution of a species because they

a. accelerate the transcription rate of DNA
b. are a source of genetic variability
c. happen over the long period of time that evolution requires
d. cut out and replace damaged or useless genes


Ans: b. are a source of genetic variability

Biology & Microbiology

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Heritability in non-scientific terms means "the capability of being inherited or being passed on by inheritance"; this is a very accurate description of the inheritance of a complex trait

A. true B. false

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Briefly describe the ventral body cavities and the major organs they contain.

What will be an ideal response?

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The ____ gland(s) secrete(s) thyroid stimulating hormone (TRH)

a. thyroid b. parathyroid c. thymus d. hypothalamus e. anterior pituitary

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What is represented by the part of the figure labeled as “B”?

a. normal tissue b. cancerous tissue c. adipose tissue d. lymph nodes e. red blood cells

Biology & Microbiology