Which brain structure is the largest and most complex?

A. The hypothalamus
B. The thalamus
C. The cerebrum
D. The cerebellum


Answer: D

Biology & Microbiology

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Researchers hypothesize that the hybrid zone of Bullock’s orioles and Baltimore orioles remains narrow because

hybrids ____.

a. are routinely eliminated by natural selection within the hybrid zone b. prefer the moist habitats of the Baltimore oriole c. prefer hotter and drier habitats of the Bullock’s oriole d. are well adapted to both the dry habitats of the Bullock’s oriole and to the moist habitats of the Baltimore oriole e. are not well adapted to the dry habitats of the Bullock’s oriole or to the moist habitats of the Baltimore oriole

Biology & Microbiology

It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that ____

A) island forms are descended from mainland forms B) common environments are inhabited by the same organisms C) island forms and mainland forms have identical gene pools D) the island forms and mainland forms are converging

Biology & Microbiology

When applied to underripe fruit, the hormone ________ hastens ripening.

A. gibberellin B. ethylene C. abscisic acid D. auxin

Biology & Microbiology

What subphylum do tunicates and seq squirts belong to?

A. Animalia B. Cephalochordata C. Chordata D. Urochordata E. Vertebrata

Biology & Microbiology