Amoeboid
Moving or feeding by means of pseudopodia (temporary cytoplasmic protrusions from the
cell body).
AMP
Abbreviation of adenosine monophosphate.
Amphibia
The vertebrate class of amphibians, represented by frogs, salamanders, and caecilians.
Amphibious
Living or able to live both land and water.
Amphipathic molecule
A molecule that has both a hydrophilic region and a hydrophobic region.
Amphioxus
Any of various small, flattened marine organisms of the subphylum Cephalochordata,
structurally similar to the vertebrates but having a notochord rather than a true vertebral
column. Also called amphioxus.
Amphoteric
Having the characteristics of an acid and a base and capable of reacting chemically either as
an acid or a base.
Amphistomatic.
Of a leaf, Having stomata on both surfaces
Amylopectin
The outer protion of a starch granule consisting of insoluble, highly branched
polysaccharides of high molecular weight.
Amyloplasts/ starch plastids
Amyloplasts are non-pigmented organelles found in plant cells responsible for the storage of
amylopectin, a from of starch, through the polymerization of glucose. Amyloplasts also
convert this starch into sugar, for when the plant needs energy.
Anabolic steroids
Synthetic chemical variants of the male sex hormone testosterone; they produce increased
muscle mass but also suppress testosterone production, leading to shrinkage of the testes,
growth of the breasts, and premature baldness; long-term use increases the risk of kidney
and liver damage and of liver cancer.
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