Answer:
Option B, It was made in stars that lived before the solar system formed.
Explanation:
Almost all the carbon that exists today with in the living organisms was produced in the stars. When these stars exploded during the big bang theory all the carbon within hem was introduced in the environment of earth some billions of years ago. Hence , though carbon introduced in earth’s environment was due to big bang, its origin is from the stars. Hence option B is the correct answer
Cyanobacteria is responsible for generation of oxygen on planet earth and thus option D is in correct.
1. cellular respiration is a way plants get food at night
Answer:
In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.
Explanation:
In the Sympathetic Nervous System PNS subdivision in which nerve injury would be the most dangerous for life.
It is important for survival to fight or respond to flight because it controls the physiological reaction to a risk or danger and this flight and flight response is activated by sympathetic nervous system. This system is a part of automatic nervous system and operated by various interconnected neuron
Because their use is not sustainable because their formation takes billions of years to renew them
