Flower Reproduction

gymnosperms-

seed plant; seed develops in a ___

angiosperm - seed plants; seed produced in ___ and subsequent fruits

flower structure - flower is specialized for ___

male structure -

anther- contain ___ sperm cells, aka pollen

filament- stalk that holds ___

pollen - grains are monoploid ___

female structures-

stigma - ___ to catch and hold pollen

style- where pollen burrows a ___ tube to reach the ___

ovary- contains ovules, develops into a ___ after fertilization

ovules- monoploid female ___ develop into ___ after fertilization

A pollen grain is composed of 2 cells:

tube cell - forms ___ tube

generative cell - divides to form 2 ___ sperm which travel down pollen tube to fertilize ___

Pollination - the transfer of pollen grains from the ___ to the ___

-when this occurs in the same plant it's ___-pollination

-when the pollen from one plant travels to the stigma of another plant, it is called ___-pollination; this exchange of genetic material increases variation

Tags

NGSS.HS-LS4-2

After pollination, each pollen grain forms a ___ tube.

The pollen grains burrow down to the ovary to the female ___ (ovule).

The union of pollen and ovule is called ___.

Double fertilization -

occurs in flowering plants of the 2 ___ sperm from the generative cell:

1 fuses w/egg to become a ___

1 fuses w/2 polar nuclei to become ___

Embryonic seed structures:

1. seed coat- ___ the seed

2. hypocotyl- develops into ___ stem and roots

3. epicotyl- develops into ___ stem and leaves

4. cotyledon- ___ source for developing seed