What is a reactant?

A an electron that participates in a chemical bond

B a sample of matter that is destroyed in a chemical change

C an amount of energy that causes a chemical reaction

D a substance that is altered in a chemical reaction

An unstable nucleus spontaneously releases a positron. this is an example of

The living part of the cell found both inside and outside of the nucleus is called protoplasm. this material is composed of proteins, carbohydrates, electrolytes, water, and what other substance? lipids hydrolytic enzymes peroxisomes acid hydrolases

You visit a region with two-way currents to see where many marine organisms inhabit shallow, nutrient rich waters. you are visiting an estuary. the open ocean. an inland wetland. a region where a stream flows into a lake.

What processes allows cells to concentrate material that is present only in very small amounts in the extracellular fluid?

The first line drug choice for a previously health adult patient diagnosed with community acquired pneumonia would be

What was the relationship of the deer herd population size and the carrying capacity of the range in 1915 1920 1924?

What's happening in the evening of a hot summer day the air is cool but the sidewalk feels warm

Need the answer quickly A scientist observed that fiddler crabs are capable of plugging up the territorial burrows that they live in.

Calcium and bromine would join with a __bond and sulfur oxygen would join with a ___bond

What does lipase digest? A. Carbohydrates B. Proteins C. Fats