When did humans begin the practice of agriculture?

A) 400,000 years ago
B) 240,000 years ago
C) 11,000 years ago
D) 2,000 years ago


C

Biology & Microbiology

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When water melts from a solid ice cube to a liquid, its volume ________ and its mass ________.

A. Decreases; increases B. Decreases; stays the same C. Increases; stays the same D. Increases; decreases

Biology & Microbiology

Annelids possess a(n) ________ skeleton that gains support from internal fluids

a. setae b. cartilaginous c. hydrostatic d. exterior

Biology & Microbiology

BamHI is a Type II restriction enzyme that recognizes the sequence 5' G*GATCC 3', and cuts between the two Gs, leaving a 5' overhang. If you were to digest DNA with BamHI, what would be the sequence of the overhanging sticky ends of the two strands?

A. 5' GATCC 3' and 5' GATCC 3' B. 5' G 3' and 5' G 3' C. 5' GATCC 3' and 5' GGATC 3' D. 5' GATC 3' and 5' GATC 3' E. 5' G 3' and 5' C 3' F. 5' GATC 3' and 5' CTAG 3'

Biology & Microbiology

The organ that performs filtration of blood, reabsorption, and secretion in vertebrates is the ________.

A. kidney B. liver C. large intestine D. pancreas E. small intestine

Biology & Microbiology