true or false
1. All the organism or species on Earth have already been identified. 2. Once the population of species increases or decreases in size it affects the balance of the ecosystem 3. Human activities are among the causes of species extinction.
4. Geologic timescale is a scale used to represent and show the existence and extinction of organisms.
5. The extinction of species does not give the earth harmful effect
. 6. Evolution is a branch of life science that describes the rapid change of organisms from one state to another.
7. Migration refers to the survival of a new species into an already occupied area.
8. Human actions have resulted in habitat loss and degradation that have accelerated the rate of extinction.
9. Biological magnification is the buildup of pollutants in organisms at high tropic levels in a food chain.
10. The Mesozoic era is marked by the existence of largest creatures. a​