The hypothesis that life developed from nonliving matter is known as:

a. abiotic evolution.
b. chemical evolution.
c. natural selection.
d. organic evolution.
e. inorganic evolution.


B

Biology & Microbiology

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The activities of cells in different layers of the tubular gastrointestinal tract are regulated by clusters of nerves located in the submucosa. These nerve complexes are called  

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Explain an impact of human development on the water cycle

What will be an ideal response?

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How are chlorophyll molecules attached to thylakoid membranes?

a. by a magnesium ion b. with a porphyrin ring c. with a methyl group d. by a hydroxide group e. by a long hydrocarbon side chain

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Hypothyroidism during infancy and childhood can lead to a condition of retarded mental and physical developmentcalled:a

dwarfism. b. gigantism. c. acromegaly. d. myxedema. e. cretinism

Biology & Microbiology