Which of the following molecules are

molecules of life?
I. carbohydrates
II. proteins
III. nucleic acids
IV. carbon



a. I only
b. I and II
c. I and III
d. I, II and III
e. I, II, III and IV


D

Biology & Microbiology

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The vegetative (nutritionally active) bodies of most fungi are _____

1) composed of hyphae 2) referred to as a mycelium 3) usually underground A) 1 and 2 B) 2 and 3 C) only 2 D) 1 and 3 E) 1, 2, and 3

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Two elements within the same group:

a. occupy the same column on the periodic table of elements. b. occupy the same row on the periodic table of elements. c. occupy the same column on the periodic table and have the same number of electrons in their outermost shell. d. have different numbers of electrons in their outermost shell. e. have the same number of electrons in their outermost shell.

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Steroid hormones have the ability to regulate transcription

Indicate whether the statement is true or false

Biology & Microbiology

Considerably more phenotypic variation exists in domesticated varieties of species like dogs and cabbages than exists in non-domesticated species like lions and maple trees. Which one of the following statements best explains why this is true?

A. Genetic drift is important because domestication involves small populations. B. Many domesticated varieties would not survive in the natural world. C. There is no selection and mating is random under domestication. D. Domesticated species exhibit "hybrid vigor" (heterosis). E. During domestication, very high rates of mutation are induced.

Biology & Microbiology