A(n) ____ is a substance composed of two or more atoms
Help with this statement, please? Thank you.
Answer: molecule
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In humans, which cell does NOT have a nucleus when mature?
a. erythrocytes b. lymphocytes c. neutrophils d. eosinophils e. monocytes
Frameshift mutations result from:a
the substitution of one base pair for another. b. the substitution of more than one base pair. c. the insertion or deletion of one or two base pairs. d. the substitution of a stop codon for an amino acid-specifying codon. e. the substitution of a start codon for an amino acid codon.
A magnesium ion contains twelve protons and ten electrons. A chloride ion contains seventeen protons and eighteen electrons. Given this information, the chemical formula for magnesium chloride is
A. MgCl. B. Mg2Cl. C. MgCl2. D. Mg2Cl2.
Which one of the following most specifically explains why plants need water to perform photosynthesis?
A) to provide the oxygen needed to make sugars B) to add a hydrogen to NADPH C) to provide electrons for the light reactions D) to add a phosphate to ATP E) to excite electrons