There are two correct statements, they are:
1. The universe looks the same from all directions, but can change and evolve over time.
4. Scientists can study the universe because the cosmological principle suggests that any physical laws or processes are the same for the entire universe.
Answer:
B. Antibodies react specifically with an antigen.
Explanation:
Serological tests are blood tests that look for antibodies in your blood. They can involve a number of laboratory techniques. Flucculation tests are based on the precipitation that takes place when antibody and specially prepared antigens are mixed together
Answer:
Atmosphere takes place in the stratosphere and we live in troposphere
