Which one of the following is the most primitive vascular plant?
A. fern
B. angiosperm
C. gymnosperm
D. moss
A. fern
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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.
Down syndrome involves trisomy
a. 3. b. 5. c. 15. d. 19. e. 21.
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.
In terms of Selye's general adaptation syndrome, coping occurs in the _____ stage.
A. alarm B. resistance C. exhaustion D. resolution