Which of the following would be necessary for evolution to take place?
A. a large population
B. genetic diversity within populations
C. asexual reproduction
D. separate male and female sexes
B. genetic diversity within populations
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Which statement is not true of the zygospore-forming fungi?
(a) They are in the phylum Zygomycota. (b) Ascospores are found in an ascus. (c) Rhizopus is a representative genus. (d) A zygospore is formed after fertilization.
Which of the following is a likely physiological effect of caffeine ingestion?
A. decrease in blood glucose levels B. decrease in central nervous system activity C. extreme increase in diuretic effects D. release of proteins into the bloodstream E. increased metabolic rate
When blood calcium levels are too low, the hormone _____ is released, which stimulates osteoclasts to break down bone and release calcium into the blood
calcitonin growth hormone estrogen parathyroid hormone
Dr. Doe designs an experiment to test whether hummingbirds prefer red flowers over white. He places a hummingbird in an aviary with one flower of each color and counts the number of times the hummingbird visits each. What be an acceptable null hypothesis for this study?
A. There is a difference in the number of visits between the red and white flowers B. Hummingbirds prefer red flowers over white C. There is no difference in the number of visits between the red and white flowers D. Hummingbirds prefer white flowers over red