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
Answer: C
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Decomposers are vital components of a food web because they:
A. incorporate the carbon contained in atmospheric CO2 into C6H12O6. B. immediately provide tertiary consumers with usable forms of carbon. C. serve as primary producers. D. return carbon (as CO2) to the atmosphere.
The most widely used herbicide in the world, 2,4-D, is a synthetic form of
a. abscisic acid. b. ethylene. c. salicylic acid. d. gibberellin. e. auxin.
Which of the following vitamins is water-soluble and cannot be stored in the body?
a. A b. D c. C d. E e. K
Enveloped viruses may enter their host cells by engulfment within coated vesicles (endocytosis).
Answer the following statement true (T) or false (F)