Which best describes a gene A. chromosome
B. a sister chromatid
C. a tetrad
D. a piece of a chromosome

D, a piece of a chromosome

Explanation:

D.a piexe of chromosome

Explanation:

because a gene is a segment of dna that codes for a trait

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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