Answer:
<em>The cosmological principle makes assumptions that provide scientific guidelines to enable its study.</em>
Explanation:
Cosmology can be described as the study of the origin of the universe.
Although scientists cannot physically study about the origin of the universe but the cosmological studies help scientists to derive ways which makes it easier to hypothesize about the origin of the universe. There are numerous theories and hypothesis generated for the origin of universe based on the cosmological principle. The cosmological principle states that universe on the whole is homogeneous and it looks the same at any location.
Answer: What roses are the best flowers is a non-scientific question.
Explanation: What flower is better is determined by personal opinion. I might think the red roses are prettier and you might think the white ones are. Where all the other questions can be tested all equally and it is not an opinion.
D- neither attribute is taking dominance so it is incomplete
Mitochondria is the power house of the cell (also pay attention in class)
Mario sets up an experiment to determine the source of the oxygen gas produced by photosynthesis. To determine this, he uses an isotope of oxygen called O-18. He labels the O-18 oxygen so he can follow its path through photosynthesis. Plant A is given carbon dioxide that contains the O-18 isotope. Plant B is given water that contains the O-18 isotope. When he examines the oxygen from both plants, only plant B produced O-18 oxygen. This indicates that the source of oxygen is water. The photosynthesis involves the transfer of electrons between the photosystem I and II. The water gets split into oxygen, hydrogen ions and electrons in the photosystem I. The electrons move to the photosystem II where the carbon fixation into sugars takes place. The plant A will have O-18 isotope in its synthesised sugar molecule, which gets stored inside it.