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ch 4 LS HRW
ch 4 LS HRW
14
Biology
7th Grade
04/11/2012

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Term
active transport
Definition
the movement of substances across the cell membrane that requires the cell to use energy
Term
cell cycle
Definition
the life cycle of a cell
Term
cellular respiration
Definition
the process by which cells use oxygen to produce energy from food
Term
chromosome
Definition
in a eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA
Term
cytokinesis
Definition
the division of the cytoplasm of a cell
Term
diffusion
Definition
the movement of particles from regions of higher density to regions of lower density
Term
endocytosis
Definition
the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food
Term
exocytosis
Definition
the process in which a cell releases a particle in a vesicle that then moves to the cell surface and fuses with the cell membrane
Term
fermentation
Definition
the breakdown of food without the use of oxygen
Term
homologous chromosomes
Definition
chromosomes that have the same sequence of genes and the same structure
Term
mitosis
Definition
a process of cell division that forms two new nuclei, each of which has the same number of chromosomes
Term
osmosis
Definition
the diffusion of water through a semipermeable membrane
Term
passive transport
Definition
the movement of substances across the cell membrane without the use of energy by the cell
Term
photosynthesis
Definition
the process by which plants, algae, and some bacteria use sunlight, carbon dioxide and water to make food
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