UNIT 5 PLANTS

PLANTS MAKE THEIR OWN FOOD (PHOTOSYNTHESIS) IN THEIR LEAVES WITH WATER, MINERALS (ROOTS), LIGHT AND ENERGY FORM THE SUN AND CARBON DIOXIDE (LEAVES).

DURING THE DAY PLANTS TAKE CARBON DIOXIDE FROM THE AIR, BUT AT NIGHT THEY NEED OXYGEN FROM THE AIR.

CLASSIFICATION OF PLANTS ACCORDING TO STEM:
GRASSES, BUSHES AND TREES.

GRASSES: THE STEM IS SOFT, THIN, FLEXIBLE AND USSUALLY SHORT.

BUSHES; THE STEM IS THICK AND HARD AND THEY HAVE LOW BRANCHES.

TREES: THICK AND HARD STEM (TRUNK). THEY ARE THE TALLEST PANTS AND HAVE HIGH BRANCHES. THEY CAN BE: DECIDUOUS OR EVERGREEN.

CLASSIFICATION OF PLANTS ACCORDING TO FLOWERS:
FLOWERING PLANTS  AND NON FLOWERING PLANTS.

NON FLOWERING PLANTS: PRODUCE SPORES (MOSSES AND FERNS)

FLOWERING PLANTS CAN BE: ANGIOSPERMS AND GYMNOSPERMS.

ANGIOSPERMS PRODUCE FRUITS WITH SEEDS (ROSES, CHERRY TREES, BLACKBERRY BUSHES, RICE, WHEAT).

GYMNOSPERMS PRODUCE CONES WITH SEEDS (EVERGREEN TREES)

FLOWERS

COROLLA: GROUP OF PETALS. PETALS ARE COLOURFUL TO ATTRACT INSECTS FOR POLLINATION.

CALYX: GROUP OF SEPALS THAT PROTECT THE FLOWER.

REPRODUCTION IN FLOWERING PLANTS

THE REPRODUCTIVE ORGANS OF A FLOWERING PLANT ARE INSIDE THE FLOWER: STAMEN AND PISTIL OR CARPEL

THE PISTIL OR CARPEL HAS THREE PARST: STIGMA, STYLE AND OVARY. THE OVARY HAS OVULES INSIDE.

THE STAMEN HAS TWO PARTS: PHILAMENT AND ANTHER AND PRODUCE POLLEN (MALE CELLS)

THE FERILIZATION OF THE PLANT TAKES PLACE WHEN THE POLLEN ENTERS THE STIGMA AND REACHES THE OVULE IN THE OVARY.

POLLINATION: TRANSFER OF THE POLLEN FROM THE STAMEN TO THE STIGMA. THERE ARE TWO AGENTS OF POLLINATION: ANIMAL POLLINATION AND WIND POLLINATION.

 

  

 

 CYCLE OF FLOWERING PLANTS

 

VIDEO ABOUT SEXUAL REPRODUCTION OF FLOWERING PLANTS