The scientific method begins with a scientific question. This question should lead to one or more testable hypotheses. Which of the following is a scientific
question that could lead to a testable hypothesis?

A. Are the birds that use the birdbath prettier in the summer or in the
winter?
B. Should people be required to maintain birdbaths?
C. Why do people want to maintain birdbaths?
D. How do temperature and humidity affect the rate of evaporation of
water?

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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