Which is a reason that protists are difficult to classify

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.

Aflashlight battery is an example of a) potential energy b) kinetic energy c) thermal energy d) solar energy

Asap. this question is 100 points if you answer it question: describe the basic relationship between ocean depth and temperature seen in the graph