At night, assuming no artificial lights, primarily ____
a. Pr absorbs red light and is converted to Pfr
b. Pr absorbs far-red light and is converted to Pfr
c. Pfr absorbs red light and is converted to Pr
d. Pfr absorbs far-red light and is converted to Pr
e. Pfr is converted to Pr
ANSWER: e
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Which of the following is not a characteristic of an X-linked recessive disorder pedigree?
A. If a woman has the characteristic, all of her sons will have it. B. If a female has the trait, her father must also have it. C. An affected son can have normal parents. D. More females than males are affected. E. The characteristic often skips a generation.
What does the accompanying figure represent?
a. an acid and a base b. two different ions c. a cation and an anion d. two different elements e. two isotopes of the same element
A plot of water-soaked soil will have less of the form of nitrogen known as ________ than dry soil
Fill in the blank(s) with correct word
Which of the following is NOT correct?
Select one: a. xylem—conducts water up from the soil b. phloem—transports organic nutrients c. vascular tissue—consists of xylem and phloem d. vascular plants—sporophyte is dominant e. sporophyte—haploid