If an element has 4 electrons, how many of them will be in the 2nd energy level?

The theory that all of the continents were once a super-continent and that those continents split apart and have been moving away from one another ever since describesthe theory ofthe theory that all of the continents were once a super-continent and

Which of the following is a characteristic that all prokaryotic and eukaryotic cells share? Use of chloroplast to create food. Use of mitochondria to obtain energy. Presence of a cell wall to maintain osmotic pressure.

With increased altitude how does the density of the atmosphere change? remains the same fluctuates increases decreases

Which of the following best explains the modern connection between people and food? Today most people in developed countries hunt or raise their own food Today most people in developed countries have a scarcity of food sources Today most people in

What is the structure and and function of the Mitochondria?

Which statement about the composition of ocean water is true? A. the composition of ocean water varies within seasons B. the composition of ocean water varies with depth C. the composition of ocean water is the same within the entire ocean D.

When a person with type O blood donates to whom can the blood be given

What Is The Job Of A Root Hair Cell?

What characteristic is shared by birds, salamanders, and sharks?

What economic factor promoted the growth of city states in nothern italy