Any substance used to kill or control certain forms of plant or animal life that are considered to be pests is a

Sugar molecules are

To become adjusted to new conditions is to

An animal, plant, or microbe whose DNA has been altered using genetic engineering techniques is

Poisonous

A situation in which a difficult choice has to be made

A very great extent or quantity; immense

Sweetener made from cornstarch

Relating to or characterized by factories, machines, etc. is

An animal or person that eats food of both plants and animals

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