A type of genetic mutation in which one of the bases in the DNA template is deleted during replication.

The portion of a neuron that receives stimuli and conveys them towards the cell body.

The five carbonic cyclic (pentose) sugar found in DNA.

The layer of skin cells under the epidermis. Contains sweat glands, hair follicles, fat, and blood vessels.

The period of relaxation of cardiac muscle during which the atrioventricular valves open and the ventricles fill with blood.

Posterior forebrain containing the thalamus and hypothalamus.

The process by which cells or tissues undergo a change toward a more specialized form or function, especially during embryonic development.

The process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration .

The process in the alimentary canal by which food is broken up physically, as by the action of the teeth, and chemically, as by the action of enzymes, and converted into a substance suitable for absorption and assimilation into the body.

Having two similar complements of chromosomes.

Any of a group of carbohydrates, as sucrose or lactose, that yield monosaccharides on hydrolysis.

The process by which a species evolves into two or more descendant or different forms; also, the process of tracing two or more species back to a common ancestor.