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
An organism that has a membrane bound nucleus is called a .
What is a eukaryote?
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 principle of natural selection that involves more offspring than will survive.
What is overproduction?
200
The term describing the outside of the cell to choose what comes in and goes out of the cell.
What is a semipermeable membrane?
200
A protein that is created after a vaccine to fight infection.
What are antibodies?
300
The nucleic acid that reads DNA and contains Uracil.
What is a RNA?
300
A factor where a non-living thing affects the ecosystem.
(Example: fertilizers)
What is an abiotic factor?
300
An inherited 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, deletion or replacement of a nucleotide in DNA, changing the DNA sequence.
Example: Normal - THE CAT ATE THE RAT
Mutation - delete the first "H" in the sentence.
New - TEC ATA TET HER AT
What is a mutation?
400
An organism that makes its own food from sunlight energy. (Autotrophs)
What is a producer?
400
Variation, Overproduction, Adaptation, Selection.
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 system that works with the respiratory system to circulate blood to the cells in your body.
What the cardiovascular/circulatory system?
500
Different forms of the same gene, represented by a letter. Two of them makes a genotype.
What is an allele?
500
Any factor that slows or limits growth of a population (ex: space, food, competition).
What is a limiting factor?
500
The idea that if separated geographically, a species will diverge into two seperate species as a result.
What is geographical isolation?
500
The process inside chloroplasts that takes in carbon dioxide, sunlight and water, turning it to sugar/glucose and oxygen .
What photosynthesis?
500
Contains villi that absorb nutrients from food and release into your blood stream.