Answer: answer B Mercury
Explanation: Mercury and Venus dont have a natural satellite
Answer:
homeostasis is the state of steady internal physical and chemical conditions maintained by living system.
Diffusion is an important process for living things; it is how substances move in and out of cells.
Diffusion helps maintain homeostasis by creating specific concentrations of molecules inside the body compared to outside and Cells in homeostasis are successfully maintaining the internal conditions necessary for basic functioning
The cell needs to export waste and other molecules, and import fuels and fluids. Plasma membranes allow water, oxygen and carbon dioxide to pass through by osmosis, or passive diffusion.
a. because 150000/ 10 = 15000. if the plane took off with 24090 kilos of fuel itll run out after an hour.
Answer:
Proton and neutron.
Explanation:
The atoms consists of three sub atomic particles - proton electron, and neutron. The proton and neutron are present inside the nucleus and electrons revolve around the nucleus.
The number of proton is equal to the number of electron in the neutral stage of atom. The atomic mass of an element can be calculated by the sum of number of neutrons and the number of protons. Hence, the subatomic particle - proton and neutron contribute to the mass of hydrogen.
Thus, the correct answer is option (b) and (d).
Valence electrons are the electron on the outer energy level and they are important because they tell if that element is compatable