The document discusses animal reproduction and development. It explains that fertilization occurs internally in reptiles and birds through the fusion of egg and sperm cells. Reptiles lay hard-shelled eggs on land, while most birds build nests and care for their eggs. Mammals give birth to live young, which develop internally after an egg is fertilized. The document also notes that eggs protect developing animals and provide nutrition until hatching or birth.

1. Objective
Identify animals which are
either hatched or born alive.
Prepared by:
Ma. LIza L. Israel
SRES Central III

2. What animals have
you seen in your
community? Have
you seen their young?
How do the young
animals look like?
Animals have their
young ones because
they can reproduce.
Do you jnow how they
reproduce?
After reading this page , Please
put a check on the box.
still do not understand the lesson
Now, I understand what the lesson is all about.
What I think about the things to do….
Easy Difficult
For this lesson I want to study It ……
Alone
With one of my classmate
Within a group
Activity 1: is called Life Cycle that
involve identifying the life cycle of
some animals.
Activity 2: is called Fertilization
where you will describe how
fertilization happens.
Activity 3: is called Animals are
born alive/hatched from eggs you
will identify animals how they are
born.
Assessment Card: Identify the
animals using the challenge
Enrichment Activities: Extend your
learning by using what you have
learned.
s
“Watch out for the Reference Card
in case you get confused along the
way!”
Student Notes

3. Reproduction is the
process by which
animals produce
young animals of their
own kind. Animals
reproduce in their
own way. Some
animals reproduce by
laying eggs. Some
animals lay eggs in
water and some
animals lay eggs on
land
What to Do:
1. Observe the
different life
cyccle of
animals.
2. Compare the
initial stages of
development of
the different
animals.
3. Compare the
adult stages of
animals.
4. After observing
the life cycle of
animals,
answer the
questions.
How similar and
different are the
initial stages of
development of
different animals?
All came from E _
_ S
How similar and
different are the
final stages of
development of
different animals?
A _ _ _ T S have
different forms and
features

4. The zygote is a
fertilized egg that
eventually develops
into an embryo or
baby organism. ( Just
like balut). If the egg
is not fertilized, it
spoils.
Fertilization is sexual
reproduction because
it involves the union
of female sex cell
called egg cel and a
male sex cell called
sperm cell.
Reproduction is the
process by which
organism produce
young ones.
embryo
Laid as egg or hatched
alive
(young organism)
What to Do:
1. Analyze the
development of the
fertilized egg as
shown in the
illustration.
2. Based on your
analysis on
fertilization, answer
the questions.
1. Which is the male sex cell?
S _ _ _ _ cell
2. Which is the female sex cell?
E _ _ cell
3. What is formed when the sex cells unite?
Z _ _ _ _ E
4. How would you call the kind of reproduction when
the sex cells are involved?
S _ _ _ _ L
5. After the egg had been fertilized, what do you call the
young organism?
E M _ _ _ _
Egg cell
(female sex
cell)
(male sex
cell)
(developing
egg)
(fertilized
egg)

5. Laying eggs in water is one of
the oldest form of animal
reproduction. Fish amphibians
reproduce in water. Female fish
may lay thousands of eggs at
one time in the water, then the
male fishes releases sperm over
the eggs. The joining of an egg
with a sperm is called
fertilization
What to Do:
1. Analyze the diagram
showing which
animals are born alive
and which are
hatched from eggs.
2. After observing the
diagram classify the
animals according to
how they are born.
3. After being laid, infer
how a laid egg
continues to develop
4. Answer te questions
that follows.
Hatched
from eggs
Born alive
Born either alive
or hatched from
eggs 1. Which animals lay eggs?
___________________________
2. Which animals deliver their
young live?
__________________________
3. Which animals deliver their
young either live or lay eggs?
__________________________

6. How much did you
learn? (please check
the box)
Nothing
More Much,
much
more!
A little
Student Notes
What you know about this page
__________________________
___
What you learned from this page
____________________
What you still want to know
about this page
__________________________
___
Complete the word in each blank
1. R _ _ _ _ _ _ _ _ _ _ N is the process
by which animals produce young
animals of their own kind.
2. Some animals are H _ _ _ _ _ D
from eggs and some animals
develop inside the body of the
parent animals and born _ L _ _ _ E
3. A S _ _ _ _ _ _ _ _ _ is the male sex
cell.
4. An E _ _ C _ _ _ is the female sex
cell.
5. The F _ _ _ _ _ _ _ _ _ egg develops
into an embryo before it is hatched
or born alive.

7. After Reading this
page
(Please encircle one
box)
I still do not
understand the task
Now I understand
what the task is all
about
What I think about the
things to do: (
Encircle o ne box)
Easy
Difficult
For the next task I went
to do it…..(check one
box)
Alone
with one of
my
classmates to
work
With in a
group
Make sure
you do
your best!
I have learned that……
1. R _ _ _ _ _ _ _ T I O N is the process by
which animals produce young animals of
their own.
2. F _ _ _ _ _ _ _ _ T I O N is the union of
egg cell and sperm cell
3. The period of time the baby animals
spend inside the mother is called G _ _ _
_ T I O N
4. Some animals are H _ _ _ _ E D
5. F _ _ H and A _ _ _ _ _ _ A N S reproduce
in water which are later on fertilized.
6. Fertilization in R _ _ _ _ L E S, B _ _ _ S
and M _ _ _ A L S takes place inside their
bodies.
7. M _ _ _ A L S give birth to their young
alive and feed them with milk.

8. What to Do:
1. Observe the
different life
cyccle of
animals.
2. Compare the
initial stages of
development of
the different
animals.
3. Compare the
adult stages of
animals.
4. After observing
the life cycle of
animals,
answer the
questions.
How similar and
different are the
initial stages of
development of
different animals?
All came from E G
G S
How similar and
different are the
final stages of
development of
different animals?
A D U L T S have
different forms and
fMeya ctourrreects answers…
___________________
Answer I don’t get correctly…
___________________
Answer I still need more
explanations…
___________________

9. embryo
Laid as egg or hatched
alive
(young organism)
What to Do:
1. Analyze the
development of the
fertilized egg as
shown in the
illustration.
2. Based on your
analysis on
fertilization, answer
the questions.
1. Which is the male sex cell?
S P E R M cell
2. Which is the female sex cell?
E G G cell
3. What is formed when the sex cells unite?
Z Y G O T E
4. How would you call the kind of reproduction when
the sex cells are involved?
S E X U A L
5. After the egg had been fertilized, what do you call the
young organism?
E M B R Y O
Egg cell
(female sex
cell)
(male sex
cell)
(developing
egg)
(fertilized
egg)
My correct answers…
___________________
Answer I don’t get correctly…
___________________
Answer I still need more
explanations…
___________________

10. What to Do:
1. Analyze the diagram
showing which
animals are born alive
and which are
hatched from eggs.
2. After observing the
diagram classify the
animals according to
how they are born.
3. After being laid, infer
how a laid egg
continues to develop
4. Answer te questions
that follows.
Hatched
from eggs
CHICKEN
BUTTERFL
Y
LIZARD
EAGLE
SNAKE
TURTLE
Born alive
DOLPHIN
MAN
HORSE
CAT
COW
DOG
Born either alive
or hatched from
eggs
SNAKE
TURTLE
1. Which animals lay eggs?
CHICKEN, BUTERFLY, LIZARD,
BIRD
2. Which animals deliver their
young live?
DOG, CAT, MAN, HORSE
3. Which animals deliver their
young either live or lay eggs?
SNAKE , TURTLE
My correct answers…
___________________
Answer I don’t get
correctly…
___________________
Answer I still need more
explanations…
___________________

11. Student Notes
My correct answers…
___________________
Answer I don’t get correctly…
___________________
Answer I still need more
explanations…
___________________
Complete the word in each blank
1. R _ _ _ _ _ _ _ _ _ _ N is the process
by which animals produce young
animals of their own kind.
2. Some animals are H _ _ _ _ _ D
from eggs and some animals
develop inside the body of the
parent animals and born _ L _ _ _ E
3. A S _ _ _ _ _ _ _ _ _ is the male sex
cell.
4. An E _ _ C _ _ _ is the female sex
cell.
5. The F _ _ _ _ _ _ _ _ _ egg develops
into an embryo before it is hatched
or born alive.

12. After Reading this
page
(Please encircle one
box)
I still do not
understand the task
Now I understand
what the task is all
about
What I think about the
things to do: (
Encircle o ne box)
Easy
Difficult
For the next task I went
to do it…..(check one
box)
Alone
with one of
my
classmates to
work
With in a
group
I have learned that……
1. R E P R O D U C T I O N is the process
by which animals produce young animals
of their own.
2. F E R T I L I Z A T I O N is the union of
egg cell and sperm cell
3. The period of time the baby animals
spend inside the mother is called G E S T
A T T I O N
4. Some animals are H A T C H E D
5. F I S H and A M B P H I B I A N S
reproduce in water which are later on
fertilized.
6. Fertilization in R E P T I L E S, B I R D S
and M A M M A L S takes place inside
their bodies.
7. M A M M A L S give birth to their young
alive and feed them with milk.
My correct answers…
___________________
Answer I don’t get
correctly…
___________________
Answer I still need more
explanations…
___________________

13. Fertilization (also known as conception, fecundation and syngamy), is the
fusion of gametes to produce a new organism. In animals, the process involves
the fusion of an ovum with a sperm, which eventually leads to the development
of an embryo. Depending on the animal species, the process can occur within
the body of the female in internal fertilisation, or outside in the case of external
fertilisation The entire process of development of new individuals is called
procreation, the act of species reproduction.
Fertilization in reptiles and birds take place inside their bodies. Reptiles lay eggs
on land. Reptile eggs have tough, leathery covering. Which keeps the eggs from
dying out. Most reptiles do not built nest for their young, instead, they dig a hole
and put their eggs into it. Reptiles do not lay as many eggs at one time as fish
and amphibians. Birds lay several eggs in a nest at one time. Bird eggs are
covered with a hard shell. Most birds Protect their eggs and take care of their
young.
An egg is an important stage in the life cycle of animals. Inside an egg is where
the animal develops. The animal gets food from the egg. This animal is protected
by a special liquid in the egg. After the animal develops, it hatches from the egg.
In time, it will grow into an adult.
Other animals such as mammals give birth to their young alive. After the sperm
cell fertilized the egg cell, a new animal forms and grows inside its mother. Dog,
bears and lions are mammals. People, cows, bats and whales are mammals,
too. Milk and eggs are very nutritious.