Hormones produced by the testes control the expression of traits for

A. hair color and eye color
B. beard development and number of fingers
C. hair color and voice quality
D. voice quality and beard development


Answer: D. voice quality and beard development

Biology & Microbiology

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Which of the following is not true of viroids?

A. Viroid RNA does not serve as mRNA nor does it direct the synthesis of mRNA. B. Viroids are small circular ssRNA molecules. C. Viroids have no protein capsids. D. Extracellular viroids have a lipid bilayer envelope.

Biology & Microbiology

Squalene, spiral valve, electroreceptors, lateral-line system, and claspers are all adaptations associated

with living members of which lineage?

a. Petromyzontoidea b. Chondrichthyes c. Actinopterygii d. Myxinoidea e. Sarcopterygii

Biology & Microbiology

If a scientist is studying the heritability of IQ, which people would show the highest correlation between their IQ scores?

A) two unrelated children B) a child and his mother C) monozygotic twins D) dizygotic twins

Biology & Microbiology

An example of a modern-day jawless fish (agnathan) is a

A. angelfish. B. shark. C. perch. D. lamprey.

Biology & Microbiology