Science Form 1: Chapter 4 (4.1)

CHAPTER 4:
Reproduction

4.1 SEXUAL AND ASEXUAL REPRODUCTION

REPRODUCTION????

Process of producing
new individuals from

living organisms

THE IMPORTANCE OF
REPRODUCTION

Produce new generation Avoid death
species

REPRODUCTION

SEXUAL ASEXUAL

Involves Does not Involve
reproductive
reproductive cells
cells

SEXUAL REPRODUCTION

• TW0 PARENT involve
• Have FERTILIZATION process
• New individual DIFFERENT to their

parent
• Have VARIATION

1-TW0 PARENT involve

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

• Have FERTILISATION process

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

ASEXUAL REPRODUCTION

SEXUAL REPRODUCTION ASEXUAL REPRODUCTION

Involve TWO parent Involve ONE parent

Fertilisation OCCUR Fertilisation NOT occur

Produce new individual is NOT identical Produce new individual is IDENTICAL to
to parent parent

HAVE variation NOT have variation

• 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

BEGONIA

ONION