Unit 2 Flashcards
Organism
An organism is a living thing.
Cell
Basic unit of structure and function in living things
Multicellular
An organism with trillions of cells specialized to do certain tasks
Unicellular
An organism with ONE cell
Stimulus
Stimuli includes changes in light, sound, flavors, and odors
Response
An action or change in behavior
Spontaneous Generation
The mistaken idea that living things arise from non-living things
Homeostasis
The maintenance of stable internal conditions
Autotroph
An organism that can produce it’s own food (producer)
Heterotroph
An organism that eats plants or animals for energy (consumer)
Movement
Being able to move around
EX: animals have to be able to move to catch their prey.
Reproduction
Organisms reproduce to create offspring that are similar the parents
Growth
The ability to grow and change
Excretion
The process by which wastes are removed from the body
Nutrients
The process of taking in food and converting it into energy and other vital nutrients required for life
Define Characteristics
There are 8 characteristics that classify a living thing. You can also use the 8 characteristics to separate all living things in the levels of classification.
The 8 Characteristics
Cells , DNA, Energy, react, excrete maintain homeostasis, reproduce, movement, and sensitivity, grow and develop
Who is Redi and why is he important?
Redi helped prove that the spontaneous generation method is wrong. Redi did a controlled experiment where he put 2 pieces of meat in different jars and put a lid on only 1. He was testing the theory that maggots grew out of meat. At the end he discovered that the flies had laid eggs in the jar that had no cap.
Sensitivity
The ability of an organism to respond to external stimuli
Respiration
Breathing
Who is Pasteur, and what did he do?
Pasteur tested the spontaneous generation method. So, he did a controlled experiment. He wanted to test the idea that bacteria does not arise from broth. He put clear broth into flasks with long necks, then he broke one of the necks off of one, and finally he saw that no bacteria had grown from the broth with the long neck that remained, and he saw that bacteria collected in the open flask with no neck.
What is Archaea Bacteria
They are single-celled microorganisms with structure similar to bacteria
What is Eubacteria
A single cell lacking a nucleus and containing DNA
What is Eukarya
A domain that is made up of organisms that contain a nucleus within their cells