Which soil region tends to accumulate mineral ions but relatively little organic matter, and is generally penetrated by mature tree roots?

a. A horizon
b. B horizon
c. C horizon
d. D horizon
e. O horizon


B

Biology & Microbiology

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In some plants, companion cells become modified into phloem cells that facilitate the short-distance

transport of various organic solutes from the symplast into the apoplast.

Indicate whether the statement is true or false.

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The anterior end of a tapeworm is known as the:a

protonephridia. b. proglottid. c. cnidocyte. d. auricle. e. scolex.

Biology & Microbiology

What did Stanley Miller's simulation of Earth's early conditions produce?

A. living cells B. amino acids C. plants D. DNA molecules E. RNA molecules

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Mesophyll tissue is part of the root system of a plant.

Answer the following statement true (T) or false (F)

Biology & Microbiology