G10 Science Lesson

3. Watch and Learn
Directions: Watch the video carefully
to reveal our topic for today. Take
down notes all the necessary
information that you may gather
that can be helpful to understand
our lesson.

4. Biodiversity:
Levels of Biodiversity
Mrs. N.A. Rivera

5. Biodiversity and Ecosystem?
Biodiversity
Biodiversity is the variety of
life forms in an ecosystem
that describes how varied
living things are in a specific
area.
It is very important since it
sustains through the flow of
energy the food web on
earth and contributes to
environmental stability.
Organisms are part of biodiversity
and may be economically and
ecologically valuable. Their
products are a source of food,
medicine, clothing, shelter and
energy.
They are important in maintaining
the balance in the ecosystem as
they perform their specific roles.
Ecosystem

6. Short for biological diversity, includes all
organisms, species, and populations; the
genetic variation among these; and all their
complex assemblages of communities and
ecosystems.
It also refers to the interrelatedness of
genes, species, and ecosystems and their
interactions with the environment.
Biodiversit
y

7. Levels Biodiversity
Generic
diversity
Species
diversity
Ecosystem
diversity

8. Levels Biodiversity
Generic
diversity
different genes &
combinations of genes within
populations.
Genetic diversity is all the
different genes contained in all
individual plants, animals,
fungi, and microorganisms.
 It occurs within a species as
well as between species.

9. Levels Biodiversity
Species
diversity
organisms that have the potential to
interbreed in nature and produce viable, fertile
offspring.
A number of different species represented in a
given community.
Population are a group of individuals of the
same species that live in the same area and
interbreed, producing fertile offspring.
Species diversity is all the differences within
and between populations of species, as well as
between different species

10. Levels Biodiversity
Species
diversity
Example:

11. Levels Biodiversity
Ecosystem
diversity
- Variation in the ecosystems
found in a region.
- Ecosystem diversity is all the
different habitats, biological
communities, and ecological
processes, as well as variation
within individual ecosystems.

12. Levels Biodiversity
Ecosystem
diversity
Ecosystem Diversity in the
Philippines
- Terrestrial Ecosystem
- Freshwater Ecosystem
- Brackish/Estuarine Ecosystem
- Saltwater/Marine Ecosystem
- Special Ecosystems

14. Assessment:
Direction: Choose the letter of
the best answer. Write the
chosen letter on a separate
sheet of paper.

15. Assessment:
1.Which is the largest scale of
biodiversity?
A.Cell diversity
B.Ecological diversity
C.Genetic Diversity
D.Species Diversity

16. Assessment:
2. Which of the following refers to
diversity?
A.extinct species
B.nonrenewable resource
C.the rate of species declines
D.the variety of species on Earth

17. Assessment:
3. The level of biodiversity that involves a
variety of habits and communities is
A.species diversity
B.population diversity
C.genetic diversity
D.ecosystem diversity.

18. Assessment:
4. Why do invasive species a threat to
biodiversity?
A.They can outcompete native organisms for
their resources
B.They can cause harm to the environment
C.They can be harmful to humans
D.All statements are true

19. Assessment:
5. Why is biodiversity important to ecosystems?
A.It reduces the number of insects in a given
ecosystem.
B.It increases at each level of the food chain.
C.It helps populations adapt to ecological changes.
D.It allows animals to feed permanently from one
type of plant.

20. Answer Key
1. B
2. D
3. C
4. C
5. B

21. ADDITIONAL ACTIVITY
Advance study on Biodiversity: The
Whole Spectrum