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Cells
Study Guide
19
Science
6th Grade
09/21/2011

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Term
cells
Definition
all living things are made up of one or more of these
Term
compounds
Definition
elements can combine chemically with other elements to form these
Term
organ system
Definition
a group of organs that work together to perform a particular life process
Term
organism
Definition
a living thing that performs its life functions on its own
Term
cytoplasm
Definition
The gel-like substance between the nucleus and the cell membrane
Term
chlorophyll
Definition
the green pigment inside chloroplasts that absorbs light
Term
photosynthesis
Definition
the process in which plants use energy from the Sun to produce food in the form of glucose
Term
vacuoles
Definition
saclike structures that store water and food inside cells
Term
cellular respiration
Definition
both plants and animals use this process to convert food to energy
Term
mitochondria
Definition
the rod-shaped structures that help carry out cellular respiration
Term
nucleus
Definition
contains the organism's genetic information
Term
cell cycle
Definition
the cell's process of growth, division, and replacement
Term
reproduction
Definition
the process of producing new organisms
Term
life span
Definition
the longest an animal can live its life
Term
life expectancy
Definition
the average time that an individual animal will live
Term
microorganism
Definition
an organism that is not visible to the unaided eye
Term
microscope
Definition
used to see tiny living things that are invisible to the unaided eye
Term
organ
Definition
a group of two or more types of tissue that work together to carry out one specific function
Term
plant cell
Definition
a cell that has a cell wall
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