The blood calcium level is lowered by the deficiency of
Both (a) and (c)
Which one of the following has an open circulatory system?
Which one of the following animals has two separate circulatory pathways?
Which one of the follwing mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?
White blood cells
Unstriated muscle cells
Red blood cells
A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?
A, B and AB only
A, B, AB and O
A and B only