What is the magnetosphere?
a.
a stream of electrically charged particles flowing at high speeds from the sun
b.
the region of Earth’s magnetic field shaped by the solar wind
c.
a glowing region in the atmosphere caused by charged particles from the sun
d.
the angle between geographic north and the magnetic pole in the Northern Hemisphere

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Why should the united state be concerned about air pollution in china?

Why do bacteria thrive even in hostile environments