feeling generous so the answers for population and ecosystems unit test are
1. Bird A survives; both birds B and C die.
2. Grassland habitats.
3. It would decrease.
4. The range shifts uphill over generations.
5. The ray population increased.
6. Humans.
7. Fossil fuel burning.
8. Invasive species.
9. Algae.
10. The sea ice melts before the chicks are ready to swim.
11. Burmese python numbers increased, and mammal populations decreased.
12. Do it yourself
13. Do it yourself