which best describes a gene? 1. the short arm of a a chromosome 2. tightly coiled strands of DNA 3. the center of a chromosome 4. a segment of chromosomal DNA

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

Ais a group of individuals of the same that exist together in the same place at the same time

Any sound above what db can cause hearing loss in human beings