Answer: The contracting cloud is then called a protostar. A protostar is the earliest stage of a star's life. A star is born when the gas and dust from a nebula become so hot that nuclear fusion starts.
Explanation:
Answer:
Cell fractionation allows to study the different parts of a cell in isolation.When the organelles have been isolated, you can see which organelles make the most energy.
Answer:
Option (A).
Explanation:
Gym or exercise is important for all the individual to stay fit and healthy. Regular exercises in gym reduce the chances of heart attack and also control the obesity problem.
The gym should be located in well developed area free from any pollution and safety is the most important in any gym. The equipment used in gym must be of best quality and the trainers should explain each and every exercise necessary for the individual. The room temperature should be well maintained and properly ventilated.
Thus, the correct answer is option (A).
