Which is not a stage during human reproduction?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

What household products contain algae?