Which plant specialization mutually benefits the young root and a fungus?

a. All of these choices

b. Root nodules
c. Mycorrhizae
d. Root hairs
e. None of these choices.


c

Biology & Microbiology

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Production of urine in the nephron begins with

a. filtration. b. tubular reabsorption. c. tubular secretion. d. tubular modification. e. active reabsorption.

Biology & Microbiology

To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the insertion of a drug resistance marker, the cells

A) that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. B) that lack the transgene grow in the presence of the drug and these are injected into a host blastocyst. C) that have deleted the transgene grow in the presence of the drug and the nuclei are injected into a host blastocyst. D) that lack the transgene grow in the presence of the drug and the nuclei are used for nuclear transfer.

Biology & Microbiology

Mendel called crosses involving two traits ____________________ crosses. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Synthetic auxins are used commercially

A) to promote seed germination. B) to promote flowering in ornamental crops. C) to promote side branching to produce bushier crops. D) as a broadleaf weed killer.

Biology & Microbiology