Answer:
Gravity.
Explanation:
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
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Copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into her reproductive tract.
Answer:
ATP.
Explanation:
Glycolysis may be defined as the process by which breakdown of glucose molecule occurs into the form of ATP. Glycolysis can occur in the presence as well as in the absence of oxygen.
The initial step of the glycolysis is the formation of glucose-6-phosphate from the glucose molecule. The ATP starts this process of the glucose oxidation with the help of the enzyme hexokinase. The first step of the glucose oxidation is the energy driven process that requires the ATP molecule.
Thus, the correct answer is option (4).
<span>an atom with a single electron in its outermost shell</span>
