Bone marrow transplant are common for certain serious illnesses. which of these functions is restored by doing a bone marrow transplant ?

1. purification of blood
2.exchange of blood gases
3.formation of blood cells

What are the four basic classes of organic molecules how do they differ structurally and functionally

Which type of neuroglia is found outside of the brain?

The genetic code is essentially the same for all organisms. based on this information, one can logically assume which of the following statements to be correct? a. dna was the first genetic material. b. the same codons in different organisms translate into the different amino acids. c. different organisms have different numbers of different types of amino acids. d. a gene from an organism can theoretically be expressed by any other organism. e. all organisms have experienced convergent evolution.