The type of element is determined by the ________
a. number of electrons
b. atomic number
c. mass number
d. number of neutrons
b
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Which of the following "vegetables" is botanically a fruit?
A) potato B) lettuce C) radish D) celery E) green beans
Plants produce more seeds when they reproduce asexually than sexually. Yet most plants reproduce sexually in nature. What is the probable explanation for the prevalence of sexual reproduction? Sexual reproduction _____
A) is more energy efficient than asexual reproduction B) ensures genetic continuity from parents to offspring C) mixes up alleles contributing to variation in a species D) is not dependent on other agents of pollination
Hornworts differ from mosses and liverworts in containing
A. small leaves. B. sporophytes. C. photosynthetic sporophytes. D. gametophytes. E. spores.
Scientists have been able to clone
a. sheep. b. cats. c. rabbits. d. pigs. e. all of these.