biology-dictionary_11-06-2009

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Molecule
Two or more atoms held together by covalent bonds.
Molting
A process in arthropods in which the exoskeleton is shed at intervals to allow growth by the
secretion of a larger exoskeleton.
Monera
In some systems of classification, the kingdom that includes the bacteria, blue-green algae,
and other microorganisms with prokaryotic cells.
Monochlamydeous flowers
Having a single floral envelope, that is, a calyx without a corolla, or, possibly, in rare cases, a
corolla without a calyx.
Monoclonal antibody
A defensive protein produced by cells descended from a single cell; an antibody that is
secreted by a clone of cells and, consequently, is specific for a single antigenic determinant.
Monocot
A subdivision of flowering plants whose members possess one embryonic seed leaf, or
cotyledon.
Monocotyledons
A member of the class of flowering plants having one seed leaf, or cotyledon, among other
distinguishing features; often abbreviated as monocot.
Monoculture
Cultivation of large land areas with a single plant variety.
Monoecious
Referring to a plant species that has both staminate and carpellate flowers on the same
individual.
Monohybrid
A hybrid individual that is heterozygous for one gene or a single character.
Monohybrid cross
A breeding experiment that uses parental varieties differing in a single character.
Monomer
The subunit that serves as the building block of a polymer.

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