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11 terms

single celled organisms and viruses chapter 1 review

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plankton
small organisms that drift and float in water
microorganisms
tiny living things that can be seen only with a microscope
characteristics of living things
organization, order (complex structure), metabolism, growth, responsiveness, adaptation, regulation, reproduction.
bacteria
(microbiology) single-celled spherical or spiral or rod-shaped organisms lacking nuclei that reproduce by fission.
archaea
Unicellular microorganisms : . Like bacteria, archaea have no true nucleus; ., domain which consists of single-celled prokaryotes that have distinctive cell membranes and cell walls (Archaeabacteria)
protists
kingdom of one celled organisms with a nucleus
virus
package of nucleic acid wrapped in a protein coat that must use a host cell's machinery to reproduce itself
capsid
protein coat surrounding the nucleic acid of a virus
producers
organisms that make their own food
decomposers
eat dead organisms and recycle their nutrients back into the ground (bacteria and fungi)
parasite
an organism that lives on or in a host and causes harm to the host