Which one of the following is the most primitive vascular plant? 

A. fern
B. angiosperm
C. gymnosperm
D. moss


A. fern

Biology & Microbiology

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Matthew has the inherited form of the eye cancer retinoblastoma (RB). His disease is caused by

A) a germline mutation in one RB allele and no mutation in the other allele. B) a somatic mutation in each copy of the RB gene in the same cell. C) a germline mutation in one RB allele and a somatic mutation in the other allele. D) a somatic mutation in one of the RB genes in the same area of the retina of one eye.

Biology & Microbiology

Down syndrome involves trisomy

a. 3. b. 5. c. 15. d. 19. e. 21.

Biology & Microbiology

Which of the following best describes the movement

of sucrose in this system? a. Sucrose moves in both directions, but net movement is from A to B. b. Sucrose moves only from A to B. c. Sucrose moves in both directions, but net movement is from B to A. d. Sucrose moves only from B to A. e. There is no net movement of sucrose.

Biology & Microbiology

In terms of Selye's general adaptation syndrome, coping occurs in the _____ stage.

A. alarm B. resistance C. exhaustion D. resolution

Biology & Microbiology