C. low humidity , when humidity is low it’s cooler outside which would be the best time for crystalline to form
B. meiosis produces cells that are used in reproduction.
Like DNA, RNA polymers are make up of chains of nucleotides. The sugars they are made up of; a five carbon ribose sugar.
Or Pentose Sugar.
I think the answer is : The enzyme and the substrate bind to form the enzyme-substrate complex :))
i hope this be helpful