Answer:
Hot stars, meaning those having surface temperatures in excess of 10,000 K (vs ∼5800 K for our sun), emit much or most of their radiation in the UV wavelength range below 300 nm, the limit for ground-based observations.
The part of the nervous system that is similar to the autopilot is the AUTONOMIC NERVOUS SYSTEM. It controls the muscles and the glands of the internal organs. It is divided into sympathetic and parasympathetic. The sympathetic autonomic nervous system brings about excitation in the body while the parasympathetic brings about calmness.
The most abundant element in earths continental crust by weight is oxygen.
Answer:
Red blood cell has lot of haemoglobin to carry more oxygen