Indicate the differences between DNA and RNA. (Select all that apply)
a. RNA is much smaller. DNA, by contrast, averages more than 100 million base pairs long.
b. RNA contains a sugar called ribose whereas DNA contains a sugar called deoxyribose.
c. RNA contains adenine, cytosine, thymine and guanine whereas DNA contains adenine, cytosine, thymine and uracil.
d. RNA consists of only one nucleotide chain whereas DNA is a double helix.
a. RNA is much smaller. DNA, by contrast, averages more than 100 million base pairs long.
b. RNA contains a sugar called ribose whereas DNA contains a sugar called deoxyribose.
c. RNA contains adenine, cytosine, thymine and guanine whereas DNA contains adenine, cytosine, thymine and uracil.
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The Cl- ion has a single negative charge and the atomic number of 17. How many electrons are on its innermost shell?
A) 18 B) 17 C) 9 D) 2
Which of the following is a form of cultural control to minimize pest populations?
A) crop rotation B) monoculture C) irrigation D) pesticide use
________ use light as their source of energy and organic molecules such as carbohydrates as their source of carbon.
Fill in the blank(s) with the appropriate word(s).
Plants with mutant ABA receptors are likely to have problems with
A. pollen tube formation. B. fertilization. C. seed dormancy. D. endosperm formation.