Growing Plants

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Slide 1

Topic 2 The World of Plants

Standard Grade Biology

Slide 2

World of Plants is divided into:

A- Introducing plants

B- Growing plants (Pollination, Fertilisation, Asexual reproduction)

C- Making food

Slide 3

The life cycle of a plant

There are 7 stages in the life cycle of a plant.

seed / fruit Formation

seed dispersal

germination

flower formation

pollination

fertilisation

development

Slide 4

Seed Structure

Parts are:

Seed coat

Forms a tough protective layer

Food store

Provides the embryo plant with food.

Embryo shoot

Embryo root

Embryo – grows into plant

Slide 5

Seed Dissection

Using a scalpel, carefully dissect your seed in half lengthways.

Draw a diagram of what you can see.

Identify the parts,

and label your drawing

(workbook p13).

Slide 6

Seeds

Slide 7

Investigation: Germination

This is an Exam Board Investigation that makes up part of your Practical Abilities grade (20% of finals)

Planning may be done in small groups but after this you must work on your own

Write in your Investigation booklet.

Slide 8

What affects germination?

3Bio2 Brainstorm 16/03/07

Spacing / number of seeds

Humidity / water volume

Type of seeds

Size of seeds

Type of soil / mass

Temperature

Depth of planting

Gases / oxygen levels

Measure by % germination after set time

Slide 9

Germination and Temperature

Example of results table. Also draw a graph.

What conclusions can you draw from your experiment?

How could you have improved it?

Slide 10

Germination conditions

Seeds need certain conditions to germinate:

Water

to activate enzymes which digest stored food

Oxygen

Needed for the production of energy for germination

Warmth

Needed for the enzymes to work effectively.

Germination is the development of a new plant from the embryo in a seed.

Slide 11

Germination and Temperature