To have a thing to compare your test results to. The control is not changed at all in an experiment so your other test results can be compared to it. It’s like the base level kinda
Aristotle was the first to begin to classify all living beings, that is he made an attempt at a taxonomy that encompassed all the species that he knew. In a way, he gave us the idea of taxonomy or classification.
Answer:
A
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Answer: chorionic villus sampling
Explanation:
CVS: A thin tube that is guided through the cervix. Is a type of prenatal diagnostic test to detect chromosomal problems that can result in genetic diseases and birth defects.
Answer:
Water (H2O)
Explanation:
Light reactions of photosynthesis release oxygen as a by-product. In the presence of sunlight, photolysis of water molecules occurs. Splitting of two water molecules obtains four electrons, four protons, and molecular oxygen. The oxygen-evolving complex, also called the water-splitting complex is associated with photosystem II (PS II). Splitting of water occurs in the oxygen evolving complex and the released electrons are passed one at a time to the reaction center of PS II. Therefore, a water molecule serves as a source of oxygen released during photosynthesis.
