Oxygen, water, and life is required for life activity. Also ap-ma-spere<-(i couldn't spell it) is required, maybe...
Proteins perform all of the required tasks, structure, and activity in living things. They are required for nearly all of the functions of an organism and without them, there would be no life.
Half life is quite simply the time required for a radioactive element to decrease by decay to half the amount.
puberty.
Metabolic processes or metabolism is the activity required to keep an organism alive. This process is the processing of food for life and energy for nutrients and nutrition.
the three factors that determine the energy cycle are solar power, electricity, and heat.
any physical activity that you enjoy and can do now and for the rest of your life.
any physical activity that you enjoy and can do now and for the rest of your life
That is a maths question, even though it envolves nuclear physics.
This question cannot be answered without first specifying the activity.
Muscle fatigue
acquintance
resource