What ocean zone lies over the continental shelf? a. aphotic b. coastal c. intertidal d. open ocean

Select all the true statements about the cosmic microwave background radiation

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen