Which diseases are contrasted in this chart? Brucellosis and coccidiosis
Bloat and external parasites
Colibacillosis and erysipelas
Mycoplasmosis and avian pox

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?

Explain what is meant by a river’s load, and describe how the load is carried.

Atype of organism that no longer exist on earth is said to be