What decomposer organism can respire anaerobically?

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.

When analyzing tree rings, what do scientists assume a thin ring indicates?

Eutrophication caused by human nutrient pollution.