<span>During adolescence are kcalorie needs per unit of body weight the highest.
</span>The amount of energy (calories) needed during adolescence<span> is high – between the ages of 15–18 years.
</span>Adolescence is characterized by rapid physical growth and changes in body composition and this is the reason why <span>nutritional and energy needs in this period are increased.</span>
4: a species is a group of interbreeding natural populations that are reproductively isolated from other such groups. Process of Speciation. The process of speciation is a 2 stage process in which reproductive isolating mechanisms arise between groups of populations.
