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1.12: Domains of Life

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
Archaea Single-celled organism with no nucleus and a different cell wall than bacteria, often thriving in extreme environments.
asexual reproduction Process of forming a new individual from a single parent.
Bacteria Single-celled organisms that do not contain a nucleus.
cell wall Tough outer layer of prokaryotic cells and plant cells; helps support and protect the cell.
DNA Deoxyribonucleic acid; nucleic acid that is the genetic material of all organisms.
domain Three primary, broadest categories of living things.
Eukarya Organisms that keep their genetic material, or DNA, inside the nucleus.
eukaryotic cell Cell that contains a nucleus and membrane-bound organelles.
nucleus Membrane enclosed organelle in eukaryotic cells that contains the DNA; primary distinguishing feature between a eukaryotic and prokaryotic cell; the information center, containing instructions for making all the proteins in a cell, as well as how much of each one.
organelle Structure within the cell that has a specific role.
peptidoglycan Complex molecule consisting of sugars and amino acids that makes up the bacterial cell wall.
photosynthesis The process by which specific organisms (including all plants) use the sun's energy to make their own food from carbon dioxide and water; process that converts the energy of the sun, or solar energy, into carbohydrates, a type of chemical energy.
prokaryotic cell Cell without a nucleus or membrane-bound organelles.

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Difficulty Level:
At Grade
Grades:
7 , 8
Date Created:
Nov 29, 2012
Last Modified:
Sep 11, 2016
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SCI.LSC.118.1.L.1