Assume that red plants crossed with white plants
give rise to pink plants. Explain how to eliminate red
plants if you start with two pinks. What will be an ideal response?
Answer: Cross until you get white and use white in crosses until
you cross two whites, then all subsequent plants will be white.
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Which of the following are the closest ancestors of humans (genus Homo)?
A. chimpanzees B. australopithecines C. prosimians D. gibbons
The phase of mitosis in which the chromosomes are aligned along the equator of the cell is
A. A, which is prometaphase. B. C, which is metaphase. C. D, which is anaphase. D. A, which is prophase. E. E, which is telophase.
The homeostatic interaction between the endocrine system and which other system is demonstrated by
aldosterone regulating salt-water balance? a. digestive system b. circulatory system c. reproductive system d. urinary system e. skeletal system
Who provided X-ray diffraction photographs of purified DNA fibers that suggested a helical structure with a consistent diameter of about 2 nm and a complete helical turn every 3.4 nm?
A. Chargaff B. Watson and Crick C. Hershey and Chase D. Franklin