Which pairs of hormones have opposite effects?

A) testosterone and melatonin
B) progesterone and insulin
C) parathyroid hormone and calcitonin
D) oxytocin and prolactin


Answer: C

Biology & Microbiology

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The Sun provided ____ in order to power the development of life on early Earth

a. continual energy b. a temperature range for liquid water to form c. radiation to power mutations d. continual energy and a temperature range for liquid water to form e. continual energy, a temperature range for liquid water to form, and radiation to power mutations

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In ferns

a. xylem and phloem are present in the sporophyte. b. the sporophyte is the dominant generation. c. the leaf is called a frond. d. all of the above are true.

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What will be an ideal response?

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One method of maintaining the genetic isolation of a population is the inability of sperm to fertilize eggs of a different species. This is called

A) gametic incompatibility. B) behavioral isolation. C) hybrid inviability. D) ecological isolation. E) temporal isolation.

Biology & Microbiology