Science Vocab (1-5-07)
Terms
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- binary fission
- a form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size
- sexual reproduction
- reproduction involving the union or fusion of a male and a female gamete
- endospore
- a small asexual spore that develops inside the cell of some bacteria and algae
- vaccine
- immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
- toxin
- a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
- flagellum
- a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)
- cytoplasm
- the protoplasm of a cell excluding the nucleus
- bacteriophage
- a virus that is parasitic in bacteria
- host
- an animal or plant that nourishes and supports a parasite
- infectious disease
- a disease transmitted only by a specific kind of contact
- decomposer
- organisms in an ecosystem that break down organic material (dead organisms, their waste, etc.)
- ribosome
- an organelle in the cytoplasm of a living cell
- antibiotic
- a chemical substance derivable from a mold or bacterium that kills microorganisms and cures infections
- virus
- (virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts
- asexual reproduction
- reproduction without the fusion of gametes
- conjugation
- the act of making or becoming a single unit
- parasite
- an animal or plant that lives in or on a host (another animal or plant)
- respiration
- the bodily process of inhalation and exhalation