Hint:Frog red blood cells have a cell control centre to control different body functions through the erythrocytes. Erythrocytes are the means for the circulatory system to provide oxygen to the body tissue via the blood. The molecule of iron, which binds up oxygen and gives the cells and the blood-red color.
Often known as red blood cells, Erythrocytes are the most regularly occurring blood cells. The erythrocytes in humans are circular biconcave that have no nuclei, and the erythrocytes are elliptically knotted in the case of frogs.
Red blood cells in human beings have no cell nucleus and most organelles have a haemoglobin space. Frog's erythrocytes will separate around 2.4 million new erythrocytes in humans. Frogs have a purple-coloured nucleus of DNA that is visible in the centre of the cell.
Researchers can easily access a large amount of amphibious DNA because the red blood cells contain the nucleus. Human persons have platelets that are cell fragments which aid blood coagulation while frogs don't have platelets.
Amphibians (like frogs) have a nucleus with DNA bearing evident in the cell core. The haemoglobin is also in the nucleus. Humans do not have the heart to give haemoglobin more room for breathing oxygen. Frogs can breathe through their skin, on the other hand.
Thus, choice B- Nucleated and with haemoglobin is the right answer.
Note: Frog blood has solid sections as well as liquid. The fluid portion is a plasma that has a solid component, such as red blood cells and white blood cells. When blood from the frogs is collected, the centrifugation process can easily generate red blood cells.