Which contraceptive methods prevent the meeting of egg and sperm by means of a physical and/or a chemical

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Why is it incorrect to say that mitochondria function only as energy factories with cell

What are the responsibilities of the region of the brain highlighted below? =+= will rate brainiest =+=