NEET 2017 Biology question
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space is available for oxygen transport
Answer: (1)
Solution
Mammalian RBCs lose their nucleus during maturation so that more space is available for haemoglobin and hence for oxygen transport; this is the functional explanation for the enucleate condition, so (d) is correct. Statement (a) is not the adaptive reason
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