Which of the following is a chemical reaction?

a.
breaking a glass pane
b.
freezing water
c.
digestion of food
d.
cutting down a tree
e.
evaporation of rubbing alcohol

Weights of golden retriever dogs are normally distributed. samples of weights of golden retriever dogs, each of size nequals15, are randomly collected and the sample means are found. is it correct to conclude that the sample means cannot be treated as being from a normal distribution because the sample size is too small? explain.

Are salt and soap nutrients or toxins for yeast? explain.

What best explains the inability for life to exist in earth early atmosphere