sexual & asexual reproduction lesson 1. sexual reproduction in plants importance of sexual...
TRANSCRIPT
Sexual & Asexual reproduction
Lesson 1
Lesson 1Sexual reproduction in plants Importance of sexual
reproduction
Reproduction
• All living things can reproduce• They produce
offspring similar to themselves.
ReproductionThere are 2 types of reproduction:–Sexual reproduction–Asexual reproduction
Sexual Reproduction•Most multicellular organisms use
sexual reproduction to increase their numbers• Sexual reproduction involves two
parents, male and female, each producing sex cells from their sex organs
Sexual Reproduction: copy
• In sexual reproduction, two parents (male and female) produce offspring.• The offspring are similar
but not identical
Reproduction in Plants
• Flowering plants undergo sexual reproduction to produce seeds.• The sex organs of a plant
are found inside the flowers.• They produce sex cells
called gametes.
Gametes• The seed is made when the male and
female gametes FUSE.• In plants- the MALE sex cell is called
POLLEN and the FEMALE sex cell is called the OVULE.• Both the male and female
reproductive organs are found in the SAME PLANT
Parts of the Flower• The STAMEN is the MALE
part of the flower and is made up of the ANTHER and FILAMENT• The ANTHER produces
POLLEN grains• The FILLAMENT holds the
anther in place
Parts of the Flower• The STIGMA is the FEMALE
part of the plant. It is STICKY and catches pollen grains• The OVARY contains the
OVULES (the female sex cell).
Reproduction in Flowers: Copy
• In flowering plants, male and female reproductive organs are found in the same individual plant.• Male gametes are found in pollen grains
and produced in the anthers of the flower.• Female gametes are found in ovules
and produced in the ovary of the flower.
Label the flower diagram
Petals
Anther
Ovule
Stigma
Style
Ovary
Copy and CompletePart of Flower Function
Ovary
Female gamete
Anther Makes pollen
Pollen
Stigma, Style and Ovary
Female reproductive organs
Why is sexual reproduction important ?
The importance of sexual reproduction
• Sexual reproduction creates a variety of offspring• Variation is important because it create
individuals with new combination of genes• Combinations of genes may give useful
characteristics such as resistance to disease, tolerance to drought
• The more variation there is in a population the more likely it is to be able to be able to survive changes in the environment.
In your own words..
Explain the importance of sexual reproduction