B2

Species become extinct because:

• Environment changes
• A new predator
• A new disease
• Can't compete for food with another species
• A catastrophic event
• A new species develops (Speciation)

Speciation

• Development of a new species
• Population of same species become so different they can no longer breed
• Isolation where populations of species are seperated e.g a flood
• The slightly different conditions, and some of the species adapt to these new conditions
• The ones with the characteristics most suited to their new environment reproduce and the ones that aren't die out eventually.
• These changes keep happening until the 2 populations are different