Characteristics of life are traits all organisms share.
1. These characteristics include a. Movement—changing body position or moving internal parts.
b. Responsiveness—sensing and reacting to internal or external changes.
c. Growth—increasing in size without changing in shape.
d. Reproduction—producing offspring.
e. Respiration—obtaining oxygen, using oxygen to release energy from foods, and removing gaseous wastes.
f. Digestion—breaking down food substances into forms that can be absorbed.
g. Absorption—moving substances through membranes and into body fluids.
h. Circulation—moving substances through the body in body fluids.
i. Assimilation—changing substances into chemically different forms.
j. Excretion—removing body wastes.
2. Metabolism is the acquisition and utilization of energy by an organism.
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