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Definition of assortative mating, symbiosis, meningitis, electronegativity, anion, vicinal, epidermis, climate, portal system, cranium

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Definition of assortative mating (noun)
form: no plural

nonrandom mating in which individuals engage in mating having more traits incommon than in random mating

Examples
Assortative mating refers to nonrandom, but selected mating according to criteria such as phenotype and proximity.

Definition of assortative mating
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Definition of symbiosis (noun)
form plural: symbioses

arrangement in which two dissimilar organisms live together in what is usually a mutually beneficial manner

Examples
A parasitic relationship is an example of symbiosis where one member benefits at the expense of another.

Definition of symbiosis
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Definition of meningitis (noun)
form: no plural

infectious illness due to infection of the brain lining with fever; pain and headaches

Examples
Bacterial meningitis can be a life-threatening illness.

Definition of meningitis
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Definition of electronegativity (noun)
form: no plural

an atom's ability to attract electrons in chemical bonds

Examples
A bond connecting atoms of different electronegativity is called a polar covalent bond.

Definition of electronegativity
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Definition of anion (noun)
form plural: anions

negatively charged ion

Examples
An ion that has gained electrons is called an anion.

Definition of anion
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Definition of vicinal (adjective)
related to the consecutive positions of substituted elements or radicals on a benzene ring

Examples
Diols with hydroxyl groups on adjacent carbons are called vicinal.

Definition of vicinal
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Definition of epidermis (noun)
form: no plural

superficial skin layer that protects the body surface

Examples
The epidermis has several layers of cells: the deepest layer of the epidermis is the germinative layer.

Definition of epidermis
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Definition of climate (noun)
form: no plural

the general weather patterns or tendencies of an area

Examples
Hawaii has a warm climate.

Definition of climate
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Definition of portal system (noun)
form plural: portal systems

system of blood vessels starting and ending in capillaries

Examples
In the portal systems blood flows through two capillary beds prior to returning to the heart.

Definition of portal system
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Definition of cranium (noun)
form: no plural

skull bone

Examples
The cranium protects the brain.

Definition of cranium
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