The rungs of DNA are made up of nitrogenous bases: adenine, thymine, guanine and cytosine. Adenine pairs with thymine, and cytosine pairs with guanine.
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answered: Guest
It allows water to resist freezing and thawing cycle.
answered: Guest
"do a testcross with a homozygous recessive plant."
What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.
What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.