Science: Order And Reality, 2.2 From Pollen To Seed

Front 1

pollination

Back 1

the transfer of pollen for the anther to the stigma

Front 2

fertilization

Back 2

the formation of a seed by the uniting of a sperm nucleus from a pollen grain with an egg cell

Front 3

nectar

Back 3

a sweet liquid usually stored in the base of the blossom

Front 4

self-pollination

Back 4

when there is such an excess of pollen that the flower pollinates itself

Front 5

cross-pollination

Back 5

when pollen is carried from one plant to another

Front 6

pollen tube

Back 6

a tube that begins to grow from the pollen's location on the stigma, through the style and into the ovary

Front 7

sperm nucleus

Back 7

what unites with the egg cell to produce a seed

Front 8

egg cell

Back 8

the cell in the ovule which unites with sperm nucleus to produce a seed

Front 9

the three parts of a seed

Back 9

ann embryo, an endosperm, and a seed coat

Front 10

embryo

Back 10

a miniature plant made up of a plumule and a radicle

Front 11

plumule

Back 11

a tiny shoot that will become the stem and leaves of a plant

Front 12

radicle

Back 12

a small root that will develop into the root system

Front 13

cotyledons

Back 13

structures desgined for food absorption and storage

Front 14

endosperm

Back 14

the tissue which surrounds the embryo and provides nutrition

Front 15

seed coat

Back 15

a tough outer covering

Front 16

germination

Back 16

the early growth of a seed

Front 17

fruit

Back 17

anything that form in the ovary of a flower

Front 18

dispersal

Back 18

scattering or distributing of seeds after they are mature

Front 19

mechanical dispersal

Back 19

occurs when the ripened fruit bursts open and scatters the seed some distance from the plant

Front 20

agent dispersal

Back 20

occurs when animals, wind, or water helps with seed dispersal