Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Growing Plants - Plant Science - Lecture Slides, Slides of Biology

This lecture series contains animal behavior, cereal, earthworm, fossils, growing plants, living factories, lower plant, mammals, natural vegetation, plant division and sharks. This lecture covers: Standard, Grade, Biology, Plants, Sed, Dissection, Investigation, Germinatoin, Temperature, Optimum, Flower, Pollination, Hayfever, fertilisation, Arrowroot.

Typology: Slides

2011/2012

Uploaded on 10/09/2012

gurudev
gurudev 🇮🇳

4.6

(10)

102 documents

1 / 48

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Topic 2
The World of Plants
Standard Grade
Biology
Docsity.com
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13
pf14
pf15
pf16
pf17
pf18
pf19
pf1a
pf1b
pf1c
pf1d
pf1e
pf1f
pf20
pf21
pf22
pf23
pf24
pf25
pf26
pf27
pf28
pf29
pf2a
pf2b
pf2c
pf2d
pf2e
pf2f
pf30

Partial preview of the text

Download Growing Plants - Plant Science - Lecture Slides and more Slides Biology in PDF only on Docsity!

Topic 2

The World of Plants

Standard Grade

Biology

World of Plants is divided into:

A- Introducing plants

B- Growing plants

(Pollination, Fertilisation,

Asexual reproduction)

C- Making food

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

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).

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.

What affects germination?

3Bio2 Brainstorm 16/03/

  • 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

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.

Germination and Temperature

• The best temperature for germination

of a species of plant is known as the

optimum temperature.

• The optimum temperature is normally

between 15oC and 30oC.

Petal

Stigma Anther

Stigma Petals

Anther

Filament

Ovary

Sepals

Ovules Nectaries

Style

Collect a cut-out flower, colour it in and put it together.

Carpel

female

parts

Stamen male parts

Pollination

  • Pollination involves the transfer of pollen

(male gamete ) from the anther to the stigma

(outermost female part)

  • If it is in the same flower it is called

self-pollination.

  • If between different flowers it is called

cross-pollination

  • Plants are pollinated by insects or the wind.

Wind Pollinated Plants

Pollination Summary

Structure Wind

Pollinated

Insect

Pollinated

Petals

Pollen

Stamen

Stigma

nectar

dull

light

dangling

feathery

none

bright colour

sticky

inside flower

sticky

makes sugar