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Oxygen diffuses from the air where it is present at a higher concentration and pressure, to the lungs where it is at a lower concentration and pressure - we say it moves 'down' these gradients; high to lo...

The double circulatory system refers to the heart having two, connected, closed circuits. The first goes from the right ventricle of the heart to the lungs and back to heart via the left atrium. The secon...

DNA is a double-stranded molecule with a base unit on each side held together by hydrogen bonds. A binds to T and C binds to G. DNA polymerase facilitates the localised breaking of these hydrogen bonds. F...

While they are both nucleic acids, there are going to be a lot of differences between DNA and RNA, starting from the names (deoxyibonucleic acid and ribonucleic acid). In terms of structure, DNA is double...

Hardy-Weinberg Principle states that in a population of randomly mating individuals:
p + q = 1
p²+2pq+q²=1
White fur = homozygous recessive = q² = 350/100 =...