Which hormone is responsible for the development of female secondary sex characteristics?

a. testosterone
b. estrogen only
c. progesterone only
d. estrogen and progesterone
e. human chorionic gonadotropin


ANSWER: b

Biology & Microbiology

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Which form of reproduction in protists is associated with a protective, resting cyst stage?

a. transverse binary fission b. longitudinal binary fission c. sexual reproduction d. budding

Biology & Microbiology

What is the definition of a species cluster?

a. a group of closely related species with a common ancestor b. a group of species that developed host races c. a group of species that exhibit polyploidy d. a group of totally unrelated species living in a common habitat e. when allopatric and parapatric speciation occur together

Biology & Microbiology

In photosynthesis, carbon dioxide enters the leaf of a plant through its open stomata

Indicate whether the statement is true or false

Biology & Microbiology

Two molecules react to produce two products, one of which is water. What type of reaction is likely to be involved?

A) a decomposition reaction B) a hydrolysis reaction C) an exchange reaction D) a synthesis reaction E) The answer cannot be determined from the available information.

Biology & Microbiology