There is a bell at the top of a tower that is 45 m high. The bell weighs 19 kg. The bell has Potential energy. Calculate it.

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?

What is the most abundant vertebrate on earth?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations