The surface of the cerebrum-the cerebral cortex-is wrinkled, or convoluted, with ridges and valleys. These valleys are known as _____

When speakers of English add "ed" to a verb to indicate past tense, they are applying a

A) morphological marker. B) dialectical marker. C) phoneme. D) prefix.

Dan turned 35 the other day. He is keenly aware of biological changes that occur as he gets older. For which of the following is he likely to find a decline when compared to when he was 25 years old?

a) hearing, muscular strength, and vision b) hearing, sensitivity to odors, and vision c) hearing, muscular strength, and sensitivity to taste d) muscular strength, sensitivity to temperature, and vision