Explain why egg and sperm cells are not in important to protozoa?
A. protozoa reproduce through the process of mitosis
B. protozoa are too small to have eggs or sperm cells
C. protozoa contains a nucleus so they do not need egg and sperm cells.
D. protozoa reproduce through spores

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

What does si stand for, when referring to a system of measurement

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?