57. How is phosphorous returned to the environment?

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

What types of energy transfers and energy transportations are involved in the domino chain reaction?