An early step in sexual reproduction in which the pairs of the chromosomes separate and randomly divide to produce gametes containing one chromosome of each type.
What is meiosis?
100
A factor where a living thing affects the ecosystem.
(Example: earthworms)
What is biotic factor?
100
The process which humans change a species by breeding it for certain traits.
What is artificial selection?
100
This is the amount of energy that needs to be absorbed in order for a chemical reaction to start.
What is Activation Energy?
100
The largest organ in your body that provides nonspecific defenses against infection.
What is the skin?
200
The result of two haploid cells--or two gametes--and contains forty-six chromosomes.
(Another name for somatic cells.)
What is a diploid?
200
An organism that gets its energy by eating another organism. (Heterotrophs)
What is a consumer?
200
The combination of all alleles within a population.
What is a gene pool?
200
Allows the cell to choose what comes in and goes out of the cell.
What are semipermeable membranes?
200
A protein that B-cells produce to aid in the destruction of pathogens. (Prevents infections.)
What are antibodies?
300
A type of RNA that brings the amino acids from the cytoplasm to the ribosomes to build proteins.
What is a tRNA?
300
A factor where a non-living thing affects the ecosystem.
(Example: fertilizers)
What is an abiotic factor?
300
A feature that allows an organism to better survive in its environment.
What is adaptation?
300
Singled celled organisms that only have a membrane, DNA, and cytoplasm.
What are prokaryotes?
300
Body system that that controls sensation, interpretation, and response
What is the nervous system?
400
This involves an insertion or deletion of a nucleotide in DNA.
Example: Normal - THE CAT ATE THE RAT
Mutation - delete the first "H" in the sentence.
New - TEC ATA TET HER AT
What is a frameshift mutation?
400
An organism that makes its own food from sunlight energy. (Autotrophs)
What is a producer?
400
Variation, Overproduction, Adaptation, Descent with Modification.
What are the main principles of natural selection?
400
A bean shaped organelle that generates energy for the cell by converting food into energy.
What is a mitochondria?
400
The section of a control system that allows for feedback and self-correction and that adjusts its operation.
What is a feedback loop?
500
* Organisms inherit two copies of each gene, one from each parent.
* Organisms donate only one copy of each gene in their gametes.
What is the Law of Segregation?
500
A species that has an unusually large effect on its ecosystem. (Example: beavers)
What is the keystone species?
500
A theory that states that daily geologic process can add up to great change over a long period of time.
What is Lyell’s theory?
500
A protein that decreases the activation energy needed to start a chemical reaction, but increases the rate of reaction, and is also sensitive to temperature, ionic conditions, and the pH of the surroundings.
What is an enzyme?
500
White blood cells that matures in the thymus and destroys infected body cells by causing them to burst.