Presentation is loading. Please wait.

Presentation is loading. Please wait.

How are new plants formed? from seeds (sexual reproduction) by producing things such as bulbs or tubers (asexual reproduction).

Similar presentations


Presentation on theme: "How are new plants formed? from seeds (sexual reproduction) by producing things such as bulbs or tubers (asexual reproduction)."— Presentation transcript:

1

2 How are new plants formed? from seeds (sexual reproduction) by producing things such as bulbs or tubers (asexual reproduction).

3 Structure of a flowering plant The leaves — these use light energy, carbon dioxide and water to make food by photosynthesis. There are four main organs of a flowering plant : The flower - contains the reproductive organs.

4 The stem — this provides support and a transport system for water and minerals to the leaves and flowers and to transport food from the leaves to the roots. The roots — these anchor the plant to the ground and absorb water and minerals.

5 The Parts of a Flower Most flowers have four parts: sepals, petals, stamens, carpels.

6 The parts of a flower Petals attract insects. Sepals protect the bud until it opens. Stamens make pollen. Pistil is the female organ

7 Stamen (male) Anther: pollen grains grow in the anther. When the grains are fully grown, the anther splits open.

8 stamens

9 POLLEN

10 Pistil (female) Stigma Style Carpel (ovary) Ovules (eggs)

11 pistil stamens

12 12 Checkpoint

13 Cross pollination - pollination is transferred from the male part of one plant to the female part of another plant.

14 Self pollination - pollen is transferred from the male part of a plant to the female part of the same plant.

15

16

17 BAT POLLINATION

18 BIRD POLLINATORS

19

20 Wind Pollination These plants typically do NOT have brightly colored flowers. Examples include trees and grasses.

21 Wind Pollination

22 Pollination Regardless of the type, the process is the same. The pollen settles on the stigma, and a pollen tube grows to the ovary.

23

24 DOUBLE FERTILIZATION One sperm joins with one egg to form an embryo plant. One sperm joins with two polar cells to become endosperm (stored food). (within the ovule)

25

26 Fruit The ovule turns into the seed and the ovary develops into a fruit.

27 ovule seed ovary fruit AFTER FERTILIZATION

28 epicotyl seed coat cotyledon hypocotyl micropyle The Seed

29 Fruits contain seeds and help to disperse seeds.

30 SEED DISPERSAL

31 dispersal by animals buried eaten

32 stick to fur or clothing

33 WIND DISPERSAL

34 WATER DISPERSAL

35 MECHANICAL DISPERSAL


Download ppt "How are new plants formed? from seeds (sexual reproduction) by producing things such as bulbs or tubers (asexual reproduction)."

Similar presentations


Ads by Google