What was the purpose of repeatedly drying, freezing, and thawing some of the fungi?
A. to kill the fungi
B. to make the fungus more susceptible to the virus
C. to prepare the fungi to infect the panic grass
D. to remove the virus
E. to prepare the fungi for growth at 65°C
D. to remove the virus
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The frequency of recombination during meiosis is a function of:
A. the alleles on the genes; recombination happens less frequently among recessive alleles. B. the distance between genes: the closer the genes are, the more frequent the recombination between them. C. the distance between genes: the farther apart the genes are, the more frequent the recombination between them. D. whether or not the genes are sex-linked; X chromosomes recombine much more frequently than do autosomes. E. whether or not the genes are sex-linked; Y chromosomes recombine much more frequently than do the autosomes.
Which of the following statements about villi is correct? (Select all correct choices.)
A. Villi can be found in both the jejunum and the ileum. B. Villi serve to increase surface area. C. Villi allow for enhanced nutrient absorption. D. Villi move food particles through the digestive tract. E. Villi secrete multiple types of digestive enzymes.
Which of the following compounds is not a source of electrons for anoxygenic photosynthesis?
A) SH- B) S2O32- C) H2O D) succinate E) All of the above are used.
Chemicals used to attract mates are called
A. hormones. B. allomones. C. pheromones. D. allelopaths. E. genetic byproducts.