Plant Reproduction

  1. Asexual Reproduction
  2. Sexual Reproduction
    1. Pollen Transfer
    2. Seed Creation
    3. Seed Transport
    4. Germination

OB51 distinguish between asexual and sexual reproduction in plants and describe a way in which a named plant can reproduce asexually

sexual and asexual reproduction

Asexual reproduction only requires one parent, sexual reproduction needs two,

Asexual Plant Reproduction

Asexual reproduction

  1. Only Requires one parent (Mother)
  2. The offspring (daughters) are genetically the same.
  3. No variation in genetics leads to no adaptation of species.
  4. Most plants that can asexually reproduce can also sexually reproduce.

Rare flower appears on tree

http://www.bbc.co.uk/news/uk-england-11167682

OB52 locate and identify the main parts of the flower: sepals, petals, carpel and stamen

The Stamen is the male reproductive organ of the flower (this is easy to remember it has the word men in it). From here the pollen is always on the anther. Through some process the pollen leaves the anther when conditions favour this.

The objective of the pollen is to land on different flower, but of the same species of plant.if this happens pollination will have taken place if the pollen lands on top of the pistil, on a slightly sticky stigma. It then burrows through the style to fertilize the egg that is in the ovary. Pollen tube growth is excellently explained here http://www-saps.plantsci.cam.ac.uk/pollen/pollen2.htm

Parts of the flower

Stamen Male part of the flower (includes the Anther & Filament)

Anther Holds the Pollen

Filament thin part that holds the anther up

Pistil Female part of the flower (Stigma, Carpel & Style)

Stigma Sticky part of the flower that catches pollen

Style Long part of the Pistil, through which the pollen tube grows

Carpel The womb / ovaries of the flower

Petal Bright Petals attract insects to the flower, green petals perform a protection from the wind (petals are delicate)

Sepal Allows the petals to be protected

pollination and fertilisation

OB53 use a suitable flower to identify the stigma, style, ovary, anther and filament

Lillies are probably the best, but if done in spring many examples to be brought in by students.

Sketch and label the flowers,

try two,

we'll pick your best

and you redraw that flower with labels

best go on the wall

OB54 understand that the stamen (anther) produces pollen, the carpel (ovary) produces the egg cell, the pollen produces the male gamete for fertilisation, the ovary produces the female gamete for fertilisation, and pollen is transferred by wind and by insects

Link to the pollination page

http://www.5min.com/Video/Plant-Reproduction-Plant-Fertilization-1354318

seed dispersal

recall that seed formation follows fertilisation, and describe seed dispersal

follow this here

describe seed structure (testa, food supply, radical, plumule)

how seeds are made, and transform into a new plant seeds

understand that seed germination is necessary to produce a new plant

investigate the conditions necessary for germination

link

Germination investigation of conditions necessary for germination