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science flashcards
nitianndra's flash cards
21
Science
8th Grade
05/25/2012

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Term
ATOM
Definition
a basic unit of a chemical element
Term
unicellular
Definition
Consisting of a single cell
Term
cytoplasm
Definition
The material or protoplasm within a living cell, excluding the nucleus.
Term
nucleus
Definition
The central and most important part of an object, movement, or group, forming the basis for its activity and growth
Term
organelle
Definition
Any of a number of organized or specialized structures within a living cell.
Term
cell wall
Definition
A rigid lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher...
Term
chloroplast
Definition
A plastid that contains chlorophyll and in which photosynthesis takes place.
Term
mitochondria
Definition
An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.
Term
vacuole
Definition
A space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid.
Term
endoplasmic reticulum
Definition
A network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane.
Term
ribosomes
Definition
A minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells.
Term
Golgi apparatus
Definition
A complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.
Term
lysosome
Definition
An organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane.
Term
eukaryotic cell
Definition
A eukaryote (or) is an organism whose cells contain complex structures enclosed within membranes
Term
prokaryotic cell
Definition
a group of organisms that lack a cell nucleus (= karyon), or any other membrane-bound organelles.
Term
specialization
Definition
making something suitable for a special purpose.
Term
tissue
Definition
1.Any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.
Term
organ
Definition
Term
chemical energy
Definition
that part of the energy in a substance that can be released by a chemical reaction.
Term
glucose
Definition
1.A simple sugar, C6H12O6, that is an important energy source in living organisms and is a component of...
Term
photosynthesis
Definition
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
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