Which of the following hormones plays a direct role in the development of secondary sexual

characteristics in males, such as facial hair, voice changes, and increasing muscle mass?



a. testosterone
b. LH
c. FH
d. all of these


A

Biology & Microbiology

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For taxonomic classification systems to be internationally shared, a scientific name must be created using the which of the following systems?

a. phylogeny b. systematic c. taxonomy d. binomial nomenclature

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The energy that fuels most life on earth comes from ____

a. the sun b. heat c. sucrose d. water e. glucose

Biology & Microbiology

Diversity often decreases during the later stages of succession

Indicate whether the statement is true or false

Biology & Microbiology

Which isolating mechanism is postzygotic?

A. hybrid sterility B. ecological isolation C. temporal isolation D. mechanical isolation E. behavioral isolation

Biology & Microbiology