1. Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level
2.protons, neutrons, and electrons have a mass, but electrons have far less mass
3.cations and protons
4. idk
I noticed that the plant2 is the highest plant.
I hope this helped:)
The answer would be D
polar ice caps melting would result in cities on the ocean having an even higher chance of flooding due to the increase in the sea level
Answer:heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic).
Explanation:
The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
