Which of the following is the basic unit of heredity?, Cell, Gene, Organ, Tissue, What process do plants use to make their own food?, Photosyntesis, Respiration, Fermentation , Transpiration, The circulatory system is responsible for transporting blood. Which organ pumps the blood throughout the body?, Kidney, Heart, Lungs, A group of organisms that can interbreed and produce fertile offspring is called a:, Population, Ecosystem, Species, Habitat, What is the smallest unit of an element that retains the properties of that element?, Molecule, Compound, Atom, Proton.

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