23 terms

Diversity

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adaptation
A characteristic that allows an organism to better survive in its environment.
structural adaptation
A physical feature that helps an organism survive in its environment.
behavioral adaptation
Something an organism does that helps it survive in its environment.
genetics
The science that studies how characteristics get passed from parent to offspring.
features
Characteristics that are common between organisms of the same species. For example, all humans have hair and eyes.
traits
All the differences that exist within features. For example, humans can have brown, gray, blue, green, and hazel eyes.
dominant
A trait that is more common.
recessive
A trait that is less common.
inherited trait
A characteristic that is passed from parent to offspring.
selective pressure
Something that makes it harder for an organism to survive in an environment.
natural selection
Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called "survival of the fittest".
genes
A segment of DNA on a chromosome that gives information for a specific trait.
chromosomes
A structure that carries genes and is found in the nucleus of a cell.
increase
Grow larger in size or number.
decrease
Grow smaller in size or number.
genotype
An organism's genetic makeup, or allele combinations.
phenotype
An organism's physical appearance, or visible traits.
variation
Any difference between individuals of the same species.
heterozygous
An organism that has two different alleles (one dominant and one recessive) for a trait.
homozygous
An organism that has two identical alleles for a trait.
selective breeding
the human practice of breeding animals or plants that have certain desired characteristics.
desired trait
A characteristic about a living thing that is beneficial to humans. For example, a bloodhound's ability to smell really well is a desired trait.
arthropod
An organism with an exoskeleton, bilateral symmetry, segmented body, many pairs of limbs, and jointed legs.
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