Living Things #1 Flashcards
(31 cards)
Autotroph
An organism that uses the sun’s energy to convert water and gas into food.
Heterotroph
An organism that cannot make its own food; a consumer.
Characteristic
A feature that helps to identify something.
Organism
A living thing.
Cell
basic unit of structure and function in living things.
Unicellular
Made of a single cell.
Multicellular
Consisting of many cells
Stimulus
Any change or signal in the environment.
Response
An action or change in behavior that occurs as a result of a stimulus.
Spontaneous generation
The mistaken idea that living things arise from nonliving sources.
Homeostasis
The condition in which an organism’s internal environment is kept stable in spite of changes in the external environment.
Species
A species is a group of similar organism that can produce that can also mate and reproduce.
Classification
Classification is the process of grouping things based on there similarities.
Taxonomy
The study of how living are classified
Domain
The most basic level of organization in the classification of organisms.
Evolution
Change over time; the process by which modern organisms have descend from accent ones.
Virus
A tiny, nonliving particle that enters and then reproduces inside a living cell.
Host
An organism that a parasite lives with, in, or on and provides a source of energy or a suitable environment for the parasite to live.
Vaccine
A substance used in a vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens.
Bacteria
Single-celled organisms that lack a nucleus; prokaryotes.
Protist
A eukaryotic organism that cannot be classified as plant, animal, or fungus.
Parasite
An organism that benefits by living with, on, or in a host in a parasitism interaction.
Resistant
Not affected, harmed, or destroyed by something.
Tissue
A group of similar cells that perform that perform a specific action