Muscles are specialized cells found in animals. Why would it be necessary for a muscle cell to have a higher percentage of mitochondria than other cells in the body?

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

How does secondary succession differ from primary succession?

Resperation is a way to release carbon back into the atmosphere