Answer:
2. have no negative particle
Explanation:
Helium atoms contains 2 neutrons and 2 protons (or 2 electrons). Thus, it has a mass number of 4 and atomic number of 2.
Alpha particles are heavy and positively charged, which make them to be deflected in a magnetic or electric charge. So, the helium atoms used as alpha particles for the gold foil experiment must have no negative particle.
The myelin sheath is the protective layer, which is present in the outer layer of the neural cells. This myelin sheath prevents the loss of electrical impulses, which are being conducted in the neurons. This also act as an insulator between neuron and its external environment.
This layer is mainly made up of the protein and fatty substance. The degeneration of the myelin sheath result in many neurological disorders.
Hence, the correct answer is myelin sheath.
There are 3 main factors: reduced sediment flow from the Mississippi, subsidence, and sea-level rise
Your teeth brake down down large food particles by chewing or grinding.
Answer:
Carbon cycle
Explanation:
Sunlight, photosynthesis and respiration is included in the carbon cycle and oxygen cycle. Oxygen cycle: The oxygen cycle is the cycle where in animal respiration atmospheric oxygen is converted to carbon dioxide and in photosynthesis it is regenerated by green plants.
