week 4 Flashcards
1
Q
Define evolution
A
change in a populations genetic makeup through successive generations
2
Q
What is the difference between allopatric and sympatric speciation
A
Allopatric speciation is speciation that results when a population is being separated by a physical barrier. Sympatric speciation is speciation that occurs without being separated by a physical barrier
3
Q
What is extinction?
A
extinction occurs when a species is unable to adapt to a changing environment
4
Q
Define local extinction
A
No longer found in a specific area
5
Q
Define ecological extinction
A
too few individuals left to fulfill its role in the ecosystem
6
Q
Define biological extinction
A
no longer found anywhere on earth
7
Q
What are the main causes of depletion of a species
HIPPO
A
- habitat destruction
- invasive species
- population growth
- pollution
- overharvesting
