Why might a scientist use a simulation in a controlled experiment? a. to observe a 1,000-year process in a single day b. to have fun while only appearing to do meaningful work c. to replace a costly experiment with something cheaper d. to avoid having to record observations by hand

A. To observe a 1000 year process in a single day

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.