Explain how bats use the speed and the intensity of the reflected echo to help them navigate prey.

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities