Which are characteristics of all bacteria? Check all that apply. NO LINKS 1. They lack a nucleus.

2. They have a nucleus.

3. They eat other organisms.

4. They make their own food.

5. They are eukaryotes.

6. They are prokaryotes.

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

20 the compound al(nh3)2 has atoms of nitrogen.