A positive control is a group in an experiment that receives a treatment with a known result, and therefore should show a particular change during the experiment. It is used to control for unknown variables during the experiment and to give the scientist something to compare with the test group.
Analogies are the result of convergent evolution<span>. Interestingly, though bird and bat wings are </span>analogous<span> as wings, as forelimbs they are </span>homologous<span>. Birds and bats </span>did <span>not receive wings from a common ancestor with wings, but they </span>did<span> inherit forelimbs from a common ancestor with forelimbs.</span>
3D LASER SCANNER FOR PALEONTOLOGY TECHNOLOGY
I guess A. Because if the ocean temperature increase that is because of tsunami or Global warming.
Answer:
1. Both Hydrogen should be positive and Oxygen is negative. I can't tell which photo that would represent however my best guess would be #2.
2. D
3. A