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?
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?
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?
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?
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.