SCIENCE 9

1. SPECIES EXTINCTIO

2. LEARNING COMPETENCY:
 Relate species extinction to the failure of populations of organisms to adapt to abrupt changes in the
environment.

3. SPECIES EXTINCTION
When the last existing individual of that species dies. This
implies that there are no more surviving organisms that
could reproduce a new generation of offspring.

4. 4 TYPES OF SPECIES EXTINCTION
 LOCAL EXTINCTION OR EXTIRPATION
 EXTANT SPECIES
 THREATENED OR ENDANGERED SPECIES
 FUNCTIONALLY EXTINCT

5. LOCAL EXTINCTION OR EXTIRPATION- A species may be extinct in a particular area but continues to exist
elsewhere.
MONKEY

6. EXTANT SPECIES- that are not
extinct.
WILD CATS

7. THREATENED OR ENDANGERED SPECIES- extant species that
are threatened by extinction or near extinction.
TARSIER

8. FUNCTIONALLY
EXTINCT-are those
preserved and maintain
only in zoos and other
artificial habitats
they are no longer
in the wild..
PANDA

9. FUNCTIONALLY
EXTINCT-are those
preserved and maintain
only in zoos and other
artificial habitats
they are no longer
in the wild..
PANDA
LOCAL EXTINCTION OR EXTIRPATION- A species may be extinct in a particular area but continues to exist
elsewhere.
MONKEY
EXTANT SPECIES- that are not
extinct.
WILD CATS
THREATENED OR ENDANGERED SPECIES- extant species that
are threatened by extinction or near extinction.
TARSIER
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10. 2 CAUSES OF EXTINCTION
NATURAL CAUSES OF EXTINCTION
 Climate Change
 Asteroids and Cosmic Radiation
 Acid rain
 Diseases and Epidemics
 Introduction of Invasive Alien Species
ANTHROPOGENIC CAUSES OF EXTINCTION
 Habitat Destruction
 Pollution
 Overexploitation

11. PROTECT BIODIVERSITY
HABITAT PROTECTION
VALUES INTEGRATION:
-it is more practical and effective to protect a habitat than to try to restore it after it has been
destroyed. A species cannot survive without a natural home. It is therefore of prime importance that
the habitat of a species remains intact.

12. ASSESSMEN
T

13. DIRECTION: Answer the following questions and write your
answer in your answer sheet.
1. Why is human overpopulation a cause of the extinction
of various organisms?
2.What do you think are the two major factors that
account for a fast rate of extinction in our country?
Justify your answer.
3.Do you think the government is doing its best to
address the major causes of plant and animal extinction
in our country? Why?

14. REFERENCE:
BREAKING THROUGH SCIENCE 9 pp. 44-
51