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Cells
Building Blocks of Life
16
Science
7th Grade
01/02/2008

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Cards

Term
Spontanious Generation
Definition
The idea that life can spring from nonliving matter
Term
Ingestion
Definition
The taking in of food
Term
Respiration
Definition
The process by which living things take in oxygen and use it to produce energy
Term
Sexual Reproduction
Definition
The way most animal and plants reproduce that usually requires two parents
Term
Metabolism
Definition
Together, all the activities of a living thing
Term
Life Span
Definition
The maximum length of time a particular organism can be expected to live
Term
Excretion
Definition
The process of getting rid of waste
Term
Digestion
Definition
The process by which food is broken down into simpler substances
Term
Stimulus
Definition
Something to which an organism reacts
Term
Nucleus
Definition
Control center of the cell
Term
Cell Wall
Definition
A strong, stiff nonliving layer outside the cell membrane which protects and supports the cell
Term
Mitochondria
Definition
A rod-shaped organelle that is located in the cytoplasm which has a smooth outer membrane and a greatly folded inner membrane that is the power house of the cell. It's a place where food molecules are broken down and their energy is used to make special energy
Term
Vacuole
Definition
A large water-filled sac in t he cytoplasm that stores food, water, wastes, and other materials in plants
Term
Chloroplast
Definition
Large, green structure in the cytoplasm which contains chlorophyll that captures energyin sunlight and uses it to produce food
Term
Endoplasmic Reticulum
Definition
A system of clear tubular passageways that spread through the cytoplasm that transport material throughout the cell
Term
Chromosome
Definition
One of a set of structures found in the nucleus; made of DNA, plus some protein that directs cell activity and stores information
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