Question

1. when did humans first appear? considering all of geologic time are humans a young species or an old species? exdplain your thinking.
2. describe what was happening to the planet during the pre Cambrian era
3. when do sharks appear on the timeline? what does this tell you about sharks fitness to survive in their environment?
which came first -land plants or land animals?
4. look up cyanobacteria .then rethink the last question.then answer it again . what about these organisms allowed to pave the way for more advanced life on earth?
5. identify and describe 3 mass extinctions events and the effect of each on the development of life on earth

Answer 1

Answer:

restaurant is the most expensive place in a country to be in the most popular way to the world cup in a world of EU food markets in

Explanation:

I am not a very good man