Cells
What are cells?
What is DNA shaped like?
Twisted Ladder
What is spontaneous generation?
Mistaken idea that living things come from non-living things.
What is an organism?
Any living thing
What four things do all living things need to survive?
Water, food, space and homeostasis
What does unicellular mean?
Single celled, one cell
Why do organisms reproduce?
To create offspring
What two scientists tested this theory?
Louis Pasteur and Francesco Redi
What is a producer?
An organism that makes its own food. Also called an autotroph.
What do organisms have to do for space?
Compete
What does multicellular mean?
Many cells
What is asexual reproduction?
The creation of identical offspring by ONE parent
Did flies and maggots grow on the unsealed jar, or the sealed jar in Redi's experiment?
Unsealed
What is a consumer?
An organism that eats other organisms. Also called a heterotroph.
What is a stimulus? Double points for an example.
A change or signal in an environment that makes an organism react.
Example: Light, sound, odors
What chemical do ALL cells need to carry out their daily functions?
Water
What is sexual reproduction?
When two parents combine their DNA to create offspring that is a mix of them both
Did bacteria/mold grow on the broken flask, or the unbroken flask in Pasteur's experiment?
Broken
How do consumers get food?
By consuming other organisms
What is a response? Double points for an example.
An action or change in behavior.
EX: Pupils dilating to light
What do all organisms need to power their cells?
Energy
Do plants reproduce sexually or asexually?
Asexually
What did both experiments done by Redi and Pasteur prove?
That living things come from living things, not non-living things.
How do autotrophs get their energy?
They use the sun's energy to convert water and gas into food (photosynthesis).
What is homeostasis? Triple points for an example.
Homeostasis is the maintenance of stable internal conditions.
EX: Shivering when cold, sweating when hot, blood pressure