Can someone help me please

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a