Which one of the following options applies to chytrids?
A. form basidia during sexual reproduction
B. are the source of penicillin
C. form symbiotic relationships with algae
D. have flagellated gametes
Answer: D
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Which of the following is a natural process of plants that can be used by humans to remove toxins from soils? Check all that apply.
_____ secretion of a substance from the roots that breaks down the toxic chemical _____ "storage" of a toxic chemical in plant tissues, which are then removed from the site _____ root pressure pushing toxins from deep in the soil towards the surface _____ physiological breakdown of the chemical into harmless products _____ transport of toxins absorbed by the roots into the shoots, where they can be collected more easily
Insects and birds excrete _____
a. ammonia c. uric acid b. urea d. nucleic acid
Which of the following is one of the assumptions of the Hardy-Weinberg law?
A) The population is small. B) Non-random mating occurs within the population. C) Mutations appear in the gene pool at high frequency. D) Migration occurs into or out of the population. E) The ability of all genotypes to survive and reproduce is the same.
During the experiment measuring energy production in plants, the highest rate of cellular respiration occurred in