The document discusses biodiversity and the variety of life found on Earth. It notes that over 1.7 million species have been classified by scientists, though the actual number is estimated to be around 15 million. A species is defined as a group that can breed and produce fertile offspring, though hybridization and asexual reproduction complicate this definition. Biodiversity refers to the number and variety of species in an ecosystem, including the genetic diversity within species and structural diversity of physical conditions that support different species, many of which depend on one another through interactions like predation, symbiosis, and food chains.

1. Diversity of Living
Things

2. Think. Pair. Share.
• Where (specifically) can we find
life on Earth?
• Is there anywhere on Earth that
life does not exist?

3. Mountain Tops: Is There Life?

4. Hot Springs: Is There Life?

5. Antarctica: Is There Life?

6. Geysers : Is There Life?

7. Digestive Tracts of Other Animals:
Is There Life?

8. Clouds: Is There Life?

9. Bottom of the Ocean:
Is There Life?

10. Deserts: Is There Life?

11. Volcanoes: Is There Life?

12. Lava: Is There Life?

13. Centre of the Earth: Is There Life?

14. Biodiversity
There are over 1.7 million classified species
known to scientists.
It is estimated that there are about 15 million.

15. What is a species?
Biological Species: all
members of a population
that can breed under
natural conditions and
produce fertile offspring.
(With some exceptions:
there are some animals of
different species that can
have fertile offspring)

16. What is a Example of
Hybridization:
species?
Orange + Pomello
However, hybridization
and asexual reproduction
make this definition
tenuous.
= Grapefruit

17. Biodiversity
For this reason, species
are also classified by
their morphology.
A Bonnethead Shark

18. Biodiversity
Biodiversity is the number and variety of species on
Earth.
Each species also has genetic diversity within its
population.

20. Biodiversity
The number of species in a particular ecosystem is
called species diversity.

21. Biodiversity
The physical conditions within an ecosystem must
also be varied to house these different species. This
is called structural diversity.

22. Biodiversity

23. Biodiversity
Often, a species will depend on another species for
its own survival (mutualism). There are 6 species
interactions:

24. Biodiversity
1 - Food supply
Ex. Many species of female mosquitoes must
consume blood to prepare for birth.

25. Biodiversity
2 - Protection
Ex. Pearlfish live inside sea cucumbers for
protection from predators.

26. Biodiversity
3 - Transportation
Ex. Burdocks have
small hooked spines
on their heads that
stick to the fur of
animals that pass
by. This is used for
seed dispersal.

27. Biodiversity
4 - Reproduction
Ex. Bees transfer
pollen between
flowers to help the
flowers perform
sexual reproduction.

28. Biodiversity
5 - Hygiene
Ex. The Egyptian
plover gets it diet by
eating food scraps in
the teeth of
crocodiles.

29. Biodiversity
6 - Digestion
Ex. Termites have
bacteria in them
that help digest the
wood they eat.