Movement of substances that requires the expenditure od atp molecules is called

Movement of substances can be classified as active transport of passive transport.

In passive transport movement of substances across the membrane occurs without the expense of ATP. It occurs usually along the concentration gradient i.e., from high concentration to low concentration.

In active transport, movement of substances require energy in the form of ATP because it happens against the concentration gradient i.e. from low concentration to high concentration.

multiplying and dividing the two decimals and the eqations by the same number of the overalls

sex cells are usually half's then they find another half and make a fertilize egg