This document discusses the life cycles of various animals. It begins by defining prime numbers as numbers with only two factors and providing examples. It then discusses composite numbers as having more than two factors. The document goes on to describe the life cycles of butterflies, mosquitoes, frogs, dogs, and cats. It notes that animals either lay eggs or give birth to live young. The life cycles involve stages of growth and development until reaching adulthood. The document also discusses the importance of animals and some endangered animal species in the Philippines. It emphasizes the role of human activities in endangering animals and the need for conservation efforts.

1. Mathematics

2. Prime Number
Prime Number – a number that has only
two factors, itself and 1.
7 is prime because the only numbers
that will divide into it evenly are 1 and 7.
7

3. Examples of Prime Numbers
2, 3, 5, 7, 11, 13, 17, 19
Special Note:
One is not a prime number.

4. Composite Number
Composite number – a number that has
more than two factors.
The factors of 8 are 1, 2, 4, 8
8

5. Examples of Composite
Numbers
4, 6, 8, 9, 10, 12, 14, 15
Special Note:
Every whole number from 2 on is
either composite or prime.

6. Our Lonely 1
Special Note:
One is not a prime nor
a composite number.
It is not prime
because it does
not have exactly
two different
factors.
It is not
composite
because it does
not have more
than 2 factors.

7. Science

8. Life Cycle of Some Animals
All living things, such as plants, animals, fungi,
and even bacteria, go through changes
throughout their lives. Birth, growth,
development, and reproduction make up the life
cycle.

9. Life Cycle of Some Animals
Life cycle is important as it ensures the
survival and continuity of species. When the
parents die, the young will continue to live
and have young when they become adults.

10. Life Cycle of Some Animals

11. Animals That Lay Eggs
Some young animals do not look like their
parents after they hatch from egg. However, their
appearance changes as they grow. The change in
form and appearance of an animal from egg to
adult is called metamorphosis.

12. Example of Animals That Lay Eggs
Butterflies undergo complete metamorphosis. An adult butterfly
lays eggs on a leaf or stem of a plant. Each egg hatches into a larva
called caterpillar. A caterpillar eats leaves and grows rapidly. As it
becomes big. it grows new skin and sheds the old once through
the process called molting. Molting occurs several times. The
caterpillar changes into a pupa. It fastens itself to a leaf or twig
and stops moving and feeding. Adult structures develop inside a
pupa that appears inactive. When the case breaks open. the pupa
has become a beautiful adult butterfly with wings to fly.

13. Life Cycle of a Butterfly

14. Example of Animals That Lay Eggs
Mosquitoes undergo complete metamorphosis. An
adult mosquito lays its eggs on the surface of still or
stagnant water. The egg hatches into a larva called
wriggler. A wriggler has a head, thorax, and abdomen.
The wriggler molts several times until it becomes a
pupa. A pupa does not feed and the adult structure
develops in it. Within 2 to 4 days, the pupa has
developed into a mosquito.

15. Life Cycle of a Mosquito

16. Example of Animals That Lay Eggs
Frogs lay their eggs in the water. The eggs are covered by a
transparent jellylike material. After 4 to 10 days, each egg
hatches into a tadpole. The tadpole has a tail for swimming
and gills for breathing in the water. It undergoes several
changes as it grows. First, the hind legs appear followed by
the front legs. The tail becomes shorter until it totally
disappears. The tadpole begins to look more like an adult
frog. Eventually, the gills are replaced by a set of lungs that
enable the young frog to breathe on land.

17. Life Cycle of a Frog

18. Animals That Give Birth to Live Young
Animals that are born alive also undergo
changes. They also pass through different stages
as they grow and develop. Most of them look
like their mothers. They differ only in size and
presence of particular body parts, such as horns,
long tail, fur, and etc.

19. Animals That Give Birth to Live Young
A dog's life cycle includes four stages: embryo, puppy,
adolescent, and adult. During the embryo stage, the
baby dog degrowth and develop during puppy stage.
Its limbs and sense organs develop and its heartbeat
becomes noticeable. A dog undergoes 63 days of
gestation period or pregnancy. The puppy stage starts
from moment of birth until 18 months when it
reaches the maturity stage.

20. Life Cycle of a Dog

21. Animals That Give Birth to Live Young
A cat's gestation period lasts for approximately 64
days. When the mother cat, called queen, is ready to
give birth, she finds a suitable spot. She gives birth to
around four or five kittens over a 2- to 6-hour period.
When kittens are born, they are considered as altricial.
They are highly dependent on their mother for the
first few weeks. Altricial means requiring nourishment.

22. Life Cycle of a Cat

23. Importance of Animals
Animals provide many benefits to people and to the environment.
They serve as sources of food for people. Most people eat the meat of
pigs, cow, fishes, and chickens. Mollusks and crustaceans are also
commonly served as food. Even some reptiles, insects, o are delicacies
for some people. Aside from being sources of food, there are other
important uses of animals. Some animals have significant roles in the
environment. They serve as habitats of others animals. For example,
corals are habitats of fishes. Corals also protect the shoreline from
strong waves. The sea anemone has a special relationship with some
fishes.

24. ENDANGERED ANIMALS
People continue to use animals for different purposes. In
acquiring and using some animals, people sometimes cause
harm to them in different ways.
Many human activities affect the population of some
animals, causing them to decrease in number. As a result,
these animals are now endangered or at risk of disappearing
or becoming extinct. Human activities like hunting and
poaching, deforestation. improper disposal of solid and
liquid wastes, and clearing of forests for farming, road
building.

25. ENDANGERED ANIMALS
People continue to use animals for different purposes. In
acquiring and using some animals, people sometimes cause
harm to them in different ways.
Many human activities affect the population of some
animals, causing them to decrease in number. As a result,
these animals are now endangered or at risk of disappearing
or becoming extinct. Human activities like hunting and
poaching, deforestation. improper disposal of solid and
liquid wastes, and clearing of forests for farming, road
building.

26. These are a number of endangered animals in
the Philippines. These include the following:
1. Philippine eagle or monkey-eating eagle (agila)
2. green sea turtle (pawikan)
3. sea cow (dugong)
4. Philippine mouse deer (pilandok)
5. flying lemur (kagwang)
6. hawksbill turtle
7. tamaraw
8. Philippine tarsier
9. Philippine spotted deer
10. Palawan peacock pheasant
11. Philippine crocodile
12. colugo

27. CONSERVATION OF ANIMALS
The government has implemented laws and created agencies
for the protection and conservation of animals. However, some
people tend to disregard these laws and continue to harm animals
and destroy their environment. People should help one another
protect animals and keep their habitats safe and clean.
As young environmentalists, you can help protect and save
endangered animals. Here are some ways you can help conserve
animals.
Join in tree-planting activities in your school or community.
Trees provide animals with oxygen, food, and shelter.