Number the steps to carry out an investigation: 1.
Make a hypothesis

2.
Collect Data

3.
Conclusion

4.
Gather materials

5.
Carry out the procedure

6.
State the problem/questions

1 A.
2 B.
3 C.
4 D.
5 E.
6 F.

Why should the united state be concerned about air pollution in china?

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere, b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify, d)anaerobic bacteria kept thriving with more oxygen

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen