Atom - CORRECT ANSWERS-smallest unit of an element
Molecule - CORRECT ANSWERS-union of two or more atoms
, Tissue - CORRECT ANSWERS-group of cells with a common structure and
function
Organ - CORRECT ANSWERS-composed of tissue functioning together for a
specific task
Organ system - CORRECT ANSWERS-composed of several organs working
together
Organism - CORRECT ANSWERS-an individual
Population - CORRECT ANSWERS-organisms of the same species in a
particular area
Community - CORRECT ANSWERS-interacting populations in a particular area
Ecosystem - CORRECT ANSWERS-a community plus the physical environment
Biosphere - CORRECT ANSWERS-regions of the Earth's crust, waters, and
atmosphere inhabited by living organisms
Energy - CORRECT ANSWERS-the capacity to do work
Metabolism - CORRECT ANSWERS-all of the chemical reactions that occur in
a cell
Sun - CORRECT ANSWERS-ultimate source of energy for nearly all life on
Earth
Photosynthesis - CORRECT ANSWERS-process that transforms solar energy
into the chemical energy of organic nutrient molecules
Reproduction - CORRECT ANSWERS-to make another organism like itself
Genes - CORRECT ANSWERS-genetic instructions
DNA - CORRECT ANSWERS-deoxyribonucleic acid - provides instructions for
organization and metabolism
Mutations - CORRECT ANSWERS-Inheritable changes in the genetic
information
Provides important source of variation
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