For First Science Test Flashcards
Prokaryotic
a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles. Prokaryotes include the bacteria and cyanobacteria.
Eukaryotic
An organism whose cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins (histones) into chromosomes. The cells of eukaryotes also contain an endoplasmic reticulum and numerous specialized organelles not present in prokaryotes, especially mitochondria, Golgi bodies, and lysosomes.
Unicellular
Consists of a single cell
Multicellular
Consisting of more than one cell
Autotrophic
Makes it own food
Heterotrophic
An organism that cannot make its own food and gets food by consuming other living things.
Sexual reproduction
Making an offspring with two organisms cannot make its own baby
Asexual reproduction
Can make its own baby without having sex
Stimuli
Any change or signal in the environment that can make an organism react in some way.
Homeostasis
The condition in which an organism’s internal environment is kept stable in spite of changes in the external environment.
Evoulution
Change over time; the process by which modern organisms have descended from ancient organisms.
Classification
The process of grouping things based on their similarities.
Taxonomy
the classification of something, especially organisms.
Cell
The basic unit of structure and function in living things.
Tissue
A group of similar cells that perform a specific function.
