Cells that are ________ possess a single set of chromosomes
A) haploid B) diploid C) somatic D) zygotes
Answer: A
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Which of the following is NOT an amniote?
a. turtles b. frogs c. humans d. eagles e. more than one of these is NOT an amniote
It is now possible to analyze the genetics of an in vitro fertilized embryo by
A. fetoscopy. B. amniocentesis. C. chorionic villi sampling. D. preimplantation diagnosis. E. postimplantation diagnosis.
Reproductive systems with external fertilization are most common in...
What will be an ideal response?
Interrupting the night with a flash of light can trigger flowering in a long-day plant. Why doesn't introducing a short period of darkness during the day cause a short-day plant to flower?
A. The circadian clock is less responsive during the day than at night. B. A brief dark period is not sufficient to trigger flowering. C. Phytochrome is only active in the dark. D. The phytochrome response also requires cool nighttime temperatures. E. Sunlight contains enough far-red light to inhibit phytochrome induction of flowering.