Why is the water cycle important? A) without water, there would be no life.
B) All organisms are made up mostly of water.
C) helps transport nutrients and waste within an organisms
D) ALL of the above

The development of_ factored in the development of complex organisms.

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

The picture represents a structure of the respiratory system. which is the function of this structure? to bring air into the body to exchange oxygen with carbon dioxide to carry air to the lungs to release oxygen from the body