FORM 1 SCIENCE - CHAPTER 4 : REPRODUCTION

CHAPTER 4:
Reproduction

4.1 SEXUAL AND ASEXUAL REPRODUCTION

Reproduction ???P?rocess of producing
new individuals from
living organisms







REPRODUCTION

SEXUAL ASEXUAL

Involves Does not Involve
reproductive
reproductive cells
cells

THE IMPORTANCE OF
REPRODUCTION

Produce new generation Avoid death
species
• different from its parents
• Shows genetic variation

SEXUAL REPRODUCTION
involve two parents

FEMALE PARENT MALE PARENT
Carries female Carries male
reproductive cell reproductive cell

FERTILISATION

fusion of male and female
gametes to produce new life

INTERNAL EXTERNAL

FERTILISATION FERTILISATION

Occur inside female Occur outside the
parent’s body female parent’s body

INTERNAL
FERTILIZATION

EXTERNAL
FERTILIZATION

ASEXUAL REPRODUCTION
• Only ONE PARENT involve
• Have NO FERTILIZATION process
• New individual SIMILAR to their parent
• Have NO VARIATION

ASEXUAL REPRODUCTION

BINARY REGENERATION VEGETATIVE
FISSION REPRODUCTION

BUDDING SPORE
FORMATION

BINARY Division of a single parent cell
FISSION into two daughter cells. Eg:
Amoeba, paramecium

BUDDING - Forming a bud on the organism’s
body

- Starts off as a swelling

REGENERATION Ability of the fragments of some
organisms to grow and develop into
PLANARIA completely new individuals

STARFISH

SPORE Spore (in sporangium) which is tiny
FORMATION and light get scattered by the wind

VEGETATIVE - Produce new plants from a vegetative part of
REPRODUCTION plant

- Vegetative part: roots, stem, bulb, leave
- Eg: carrot, onion, ginger, potato