The combination of ____ causes the gonads to secrete sex steroid hormones

a. estrogen and progesterone
b. testosterone and oxytocin
c. estrogen and FSH
d. testosterone and LH
e. FSH and LH


ANSWER: e

Biology & Microbiology

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Marbles is a Manx cat whose tail is so short that she appears not to have one. The genotype for short tail in Manx cats is heterozygous (Mm). Cats that are genotype mm have normal length tails, but cats that are genotype MM die before birth due to highly abnormal brains and spinal cords. Marbles has one copy of a dominant ________ allele.

A) pleiotropic B) penetrant C) lethal D) polymorphic

Biology & Microbiology

The area beyond the neritic zone is called

a. abyssal plain. b. ocean basin. c. trench. d. continental margin. e. the hadal zone.

Biology & Microbiology

DNA fragments can be separated in gel electrophoresis because

A. nitrogenous bases have a net negative charge. B. phosphate groups have a net negative charge. C. nitrogenous bases have a net positive charge. D. phosphate groups have a net positive charge.

Biology & Microbiology

A measure of the degree of disorder in a system is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology