The document discusses biological diversity, also known as biodiversity. It states that there are an estimated 2.5 million species currently living on Earth, but the actual number could range from 5 to 30 million. The largest groups of species are insects, vascular plants, and animals other than insects, which together make up over 90% of all known living species. A phyletic lineage is defined as an unbroken series of ancestors and descendants through evolution.

2.  Meaning ; “Bio” means “life” and “diversity”
means “number and variety”
 Total number of species on planet of earth
2,500,000 (2.5 million)
 Estimate showed the number of species from 5 to
30 million

3.  Insects
 Vascular plant
 Animals (other than
insects)
 Fungi, algae, protozoa &
prokaryotes
 53.1%
 17.6%
 19.9%
 9.4%

4.  A phyletic lineage is an unbroken series
 From ancestors to descendants sequence
 Each later species having evolved from one that
immediately preceded it
 Record of the soft bodied organisms has not been
preserved as fossils

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