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Exam Review
science exam review for 1st semester
27
Science
7th Grade
01/22/2008

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Cards

Term
Cell Membrane
Definition
A protective layer that covers a cell's surface
Term

DNA

Definition
The genetic material that carries information needed to make new cells or new organisms
Term
Nucleus
Definition
An organelle that contains DNA and has a role in growth, metabolism, and reproduction.
Term
Organelle
Definition
A structure that performs a specific function in the cells.
Term
Cytoplasm
Definition
The fluid inside a cell.
Term

Tissue

Definition
A group of cells with the same function make up.
Term

System

Definition
The highest level of organization.
Term
Cell
Definition
The smallest unit that can perform all the necessary processes for life.
Term
Ribosomes
Definition
The organelle that make protien, found on the membranes endoplasmic reticulum.
Term
Endoplasmic Riticulum
Definition
Part of the cell that acts as the cells delivery (highway) system.
Term
ATP
Definition
Storage space where energy released by a cell's mitochondrion.
Term
Vacuole
Definition
A large vesicle that aids in digestion within plant cells the way lysosomes do.
Term
Mitochondrion
Definition
Most of the cell's ATP is made and stored in the inner membrane.
Term
Chloroplast
Definition
Where photosynthesis takes place in a cell
Term
Lysosome
Definition
Digest food particles
Term
Diffusion
Definition
Particles move from areas of higher concentration to lower concentration.
Term
Cellular Respiration
Definition
Cells use oxygen to produce energy from food.
Term
Photosynthesis
Definition
Allows a plant to produce food (glucose).
Term
Osmosis
Definition
When water diffuses into and out of the cell.
Term
Active Transport
Definition
A cell moving particles with the use of energy.
Term
Chloroplasts
Definition
Where chlorophyll is located.
Term

 

True-Breeding plants self-pollinate

Definition
All of its offspring have the same traits as the parent.
Term
Self-Pollinating Plant
Definition
When a plant fertilizes itself.
Term
Incomplete Dominance
Definition
Each gene has its own degree of influence.
Term
Meiosis
Definition
Whensex cells are copies with half the number of chromosomes.
Term
A,T,G,C
Definition
Letters that represent four bases.
Term

Watson and Crick

Definition
Men who built a DNA model like a long, twisted ladder.
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