Glossary of biological terms: P
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panicle (adjective paniculate).
A branched or compound raceme: an inflorescence of flowers on a plant
in which the main stalk gives rise to side stalks that in turn give rise to a
series of flowers. Each side stalk of flowers is a seperate raceme
defined by the oldest flowers being at the base and the youngest ones at the
organism that lives in or on the body of another organism (its host), at least
for part of its life cycle, feeding on the tissues of its host. Insect parasites
that kill their hosts are termed parasitoids.
insect that feeds in or on another living animal for a long time, eating most of
its tissues and eventually killing it.
Development of the adult form from an unfertilised egg.
perianth (botany). The
outer unit enclosing the flower, made up of an outer calyx and inner corolla,
or either calyx or corolla, or both combined and undifferentiated from one
petal (botany). The corolla of a flower is
divided up into petals whereas the calyx (which usually encloses
the corolla at its base) is made up or sepals. If the calyx and corolla
are combined into one undifferentiated unit, then the individual parts are
referred to as tepals. See perianth for
prosoma (zoology). In the
(arachnids and kin), the body is divided into two main parts (tagmata),
the prosoma (also termed cephalothorax) and the opisthosoma
(also termed thorax). In insects, the head and thorax divide the functions
of eating and sensing from those of locomotion (legs) whereas in the
Cheliceriformes the prosoma combines both these sets of functions.