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adult
An organism that is fully developed or mature.
animal
A living being capable of movement or motor response to stimulation.
bacteria
One-celled microorganisms, some of which function as agents of decay by breaking down dead plants & animals; sing., bacterium.
biotic potential
The largest possible increase in any population if there were a maximum number of births and no deaths; the inherent capacity of an organism or species to reproduce & survive.
characteristic
A distinguishing feature or quality.
dead
No longer alive (contrast nonliving).
decay
To break down into tiny particles; due to the action of such microorganisms as molds and bacteria.
egg
The female reproductive cell; the first stage in the life cycle of some organisms.
flower
The reproductive structure of a seed plant, within which seeds begin to form.
fruit fly
A small fly whose larvae feed on decaying fruits and vegetables.
generation
The time period in which an organism is born, grows and develops, and dies.
growth
An increase in size or development of a living thing.
larva
The first stage after hatching of an animal that undergoes metamorphosis; pl., larvae.
leaf
One of the expanded, usually green, organs borne by the stem of a plant; pl., leaves.
life cycle
The repeating sequence of changes as one generation of an organism develops from an egg or seed to an adult, which in turn reproduces to create the next generation.
living
Having life; being alive.
metamorphosis
A change in body structure from larvae to pupa to adult, which takes place during the life cycle in such organisms as flies & butterflies.
mold
A fuzzy growth, usually white or blue, that forms on the surface of organic matter, caused by fungus in the presence of dampness or decay.
nonliving
Never having been alive (contrast dead).
nutrients
Materials used for food; substances that help growth and development.
petal
The exterior, often rayed, foliage of a flower.
pistil
The female organ of a flower, consisting of the ovary, the stigma, and the style.
plant
A living being that produces its own food and typically lacks locomotive movement or obvious sensory organs.
pollen
Tiny grains produced in the anther, or tip, of the stamen in a flower and containing the male sperm.
population
A group of organisms of the same species living & reproducing in a particular area.
pupa
The stage of development between the larva and adult that organisms undergo during metamorphosis; pl, pupae.
root
The part of a plant that grows downward, into soil or water, in order to absorb water and nutrients.
seed
A plant structure that contains a plant embryo and a stored food supply and that can grow into a mature plant if environmental conditions are suitable.
seedling
A young plant grown from a seed.
seed coat
The thin covering that protects a seed until conditions are suitable for germination.
seed halves
The two large parts of a seed.
seed pod
A dry, hollow fruit with seeds in it; a seed case.
sprout
To germinate and begin to grow from seed to seedling.
stamen
The male organ of a flower, which produces pollen containing sperm.
stem
The part of a plant that grows upright and that supports the leaves, flowers, and fruit.
tiny plant
The part of the plant located between two seed halves.
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