Page 66 - Genius Kidz Prudence Learning Sc-8

FERTILIZATION case of frogs, starfish and fishes. External

Fusion of male and female gametes to form fertilization is common among aquatic
zygote is called fertilization. Fertilization can organisms.
be of two types on the basis of site of its (2) Internal fertilization : Fertilization taking
occurrence: place inside the body of organisms is called

(1) External fertilization : Fertilization taking internal fertilization, for example, in the
place outside the animal body is called case of human beings, earthworms,
external fertilization. For example in the reptiles, birds, etc.

Activity 1
Investigate about the term “In vitro fertilization” and write a brief description in the space provided.

_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________

VIVIPAROUS AND OVIPAROUS ANIMALS · Viviparous

There are 3 ways by which animals produce · Oviparous
their young ones based on whether the · Ovoviviparous
development of the zygote takes place outside
the body of the female parent or inside i.e., Viviparous: In these animals, internal

whether they lay fertilized or unfertilized eggs fertilization takes place, the zygote develops
or give birth to young ones. Based on these 3 into a young one inside the body of the female
e.g. majority of mammals(cows, dogs,
ways the animals are classified as:

Examples are human beings birds, etc.

hermaphrodite, for example, earthworm and leech.

66