Compared to those of humans, the erythrocytes in frog are
(1) Nucleated and without haemoglobin (2) Without nucleus but with haemoglobin
(3) Nucleated and with haemoglobin (4) Very much smaller and fewer
(1) Nucleated and without haemoglobin (2) Without nucleus but with haemoglobin
(3) Nucleated and with haemoglobin (4) Very much smaller and fewer