Snow is precipitation in the form of ice crystals. It originates in clouds when temperatures are below the freezing point (0 degrees Celsius, or 32 degrees Fahrenheit), when water vapor in the atmosphere condenses directly into ice without going through the liquid stage.
Answer C, I think. Hope to help :)
RNA polymerase: An enzyme that is responsible for making rna from a dna template.
Ribosome: a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells.
Promoter: A region of DNA that initiates transcription of a particular gene.
Regulator: Any organism that can maintain a constant internal environment largely independently of the external environment.
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The definitions of "sector 3" and "stratum D", the layout of the sectors,
and the behavior of the strata would go a long way toward explaining
that mysterious absence.
Answer : Option A) He asked what would happen if he deliberately inoculated someone with cowpox fluid from another person.
Explanation : Edward Jenner wanted to know what would happen if he deliberately inoculate the cowpox fluid from some person to another. He tested this experimental results and later on came up with the hypothesis. Which roughly state that someone will not get smallpox because they already had cowpox.