Fraternal twins 

A. must be of the same sex.
B. can be of the same sex.
C. must be of different sexes.
D. are always of the same sex.


B. can be of the same sex.

Biology & Microbiology

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The global assembly line refers to consumer goods that are made

A) with raw materials, components, labor, and manufacture from around the world. B) in one country and designed to be marketed and sold around the world. C) with capital invested by people, businesses and banks from around the world. D) with the goal of employing as many people in the periphery as possible. E) in factories that are sited on both sides of an international border.

Biology & Microbiology

Oxytocin is secreted by the posterior pituitary in females only

Indicate whether the statement is true or false.

Biology & Microbiology

Atomic nuclei contain protons and ________.

A. neutrons B. isomers C. ions D. moles

Biology & Microbiology

The agouti is most directly involved with the Brazil nut tree's dispersal of _____

A) female gametophytes B) sporophyte embryos C) sporophyte megaspores D) female gametes

Biology & Microbiology