Keystone Vocab page 6
Terms in this set (11)
Endoplasmic reticulum (ER)
An organelle, containing folded membranes and sacs, responsible for the production, processing, and transportation of materials for the use inside a eukaryotic cell. There are two forms of this organelle: a rough form that has surface ribosomes and participates in the synthesis of proteins mostly destined for export by the cell and a smooth form that has no ribosomes and participates in the synthesis of lipids and steroids as well as the transport of synthesized macromolecules.
A theorized process in which early eukaryotic cells were formed from simpler prokaryotes.
A model that illuminates the biomass productivity at multiple trophic levels in a given ecosystem.
A process in which energy changes from one form to another form while some of the energy is lost to the environment.
The total surroundings of an organism or a group of organisms.
A protein that increases the rate of a chemical reaction without being changed by the reaction; an organic catalyst.
A type of organism composed of one or more cells containing a membrane-bound nucleus, specialized organelles in the cytoplasm, and a mitotic nuclear division cycle.
A process in which new species develop from preexisting species(biological evolution or macroevolution); a change in the allele frequencies of a population of organisms from generation to generation(genetic evolution or microevolution).
A process in which a cell releases substances to the extracellular environment by fusing a vesicular membrane with the plasma membrane , separating the membrane at the point of fusion and allowing the substance to be released.
A term that typically describes a species that no longer has any known living individuals.
Located outside a cell.
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