Potassium (chemical symbol K, atomic number 19), a member of a group of chemical elements called alkali metals. Potassium ions are crucial nutrients for living organisms. The hydroxide of potassium is an significant industrial chemical that is used in fertilizers.
Beryllium is a member of the alkaline earth metals family and positioned at the top of group two of the periodic table. Beryllium alloys are used in the production of structural and lightweight materials for space vehicles, missiles, high-speed aircraft, and communication satellites. The thin sheets of beryllium foil are utilized with X-ray detection diagnostics because the foil can filter out visible light as well as allow only X-rays to pass through.
Answer: The correct option is D.
All of the above.
Explanation:
This is because complex organisms developed from cyanobacteria and release of oxygen. Cyanobacteria is a blue green algae and first organism that photosynthesized. It uses carbondioxide and water in the presence of the chlorophyll present and light energy to produce carbohydrates and oxygen. The oxygen released into the atmosphere brought about respiration and development of ozone.
This great oxidation event changed the Earth and life on Earth too.
Blood flow is greater when you exercise because the blood vessels in your muscles dilate. Imagine water flowing through a fire hose compared to a garden hose.
Red Sea/East Africa. It is the only place on Earth where a rift zone isn't already under an ocean. IE here new basaltic crust is being created while continental landmasses are being pushed away from the rift.