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16 Cards in this Set

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What is nucleic acid
The gentic material, the chemical instructions that direct cells activities.
stimulis/stimuli
A change in an organisms surroundings that cause it to react.
changes in light, sound etc.
spontaneous generation
The idea that living things arise from nonliving sources
ex: flies around decaying meat, rotting meat produces flies
Francesco Redi 1600's
Redi's experiment
Redi placed meat in 3 identical jars, one jar was uncovered, the other had small holes in it, and the third was completely covered. Meat in open jar had flies in it, the meat with the holes had fly eggs, and the covered meat was untouched.
controlled experiment
An experiment where everything is identical except 1 factor
variable
The one factor that changes in an experiment.
Louis Pasteur's Experiment
Put clear broth in 2 flasks with curved neck. Necks let in O2 and kept out bacteria from air. Boiled broth in one flask, not in other. Unbolied broth was cloudy b/c of bacteria, boiled broth was clear.
What are the four basic needs that all living things must satisfy?
energy, water, living space, and stable internal conditions
autotrophs
self-feeders, use the food they make as an energy source
ex: plants use sun's energy
hetertrophs
organisms that cannot make their own food.
ex: humans
variable
The one factor that changes in an experiment.
Louis Pasteur's Experiment
Put clear broth in 2 flasks with curved neck. Necks let in O2 and kept out bacteria from air. Boiled broth in one flask, not in other. Unbolied broth was cloudy b/c of bacteria, boiled broth was clear.
What are the four basic needs that all living things must satisfy?
energy, water, living space, and stable internal conditions
autotrophs
self-feeders, use the food they make as an energy source
ex: plants use sun's energy
hetertrophs
organisms that cannot make their own food.
ex: humans
homeostasis
The body's ability to keep an internal balance despite external conditions