Which of the following is the best definition of DNA?

A. A molecule made up of a long string of amino acids

B. A double-stranded molecule with coded instructions for an
organism's physical characteristics

C. Any organic molecule that contains carbon, hydrogen, and oxygen

D. The basic unit of a nucleic acid, made of a phosphate, sugar ring,
and nucleotide base

Which of the following is a difference between a food chain and a food web? selected: a. food webs contain both plants and animals. food chains only contain animals.this answer is incorrect. b. food webs show energy transfer. food chains show which animal eats which animal. c. food webs separate organisms by tropic level. food chains do not. d. food webs are a complex patterns of energy flow. food chains only show one line of energy flow.

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

The shift of a vehicle's weight around its center of gravity is known as