Which statement is true? o a. a hypothesis must be based on the researcher's analysis of the data collected in the experiment. o b. a hypothesis must be testable for it to be useful in scientific research. o c. a hypothesis must be supported by the results of the research study.

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Which structure in the cardiovascular system connect arteries to veins?