Prokaryotic cells are simple, ancient cells without a nucleus. Eukaryotic cells are more complex and have a nucleus.
I honestly think that a or d would be the best options. I would start with D and if that doesn't work try a.
Birds, just like humans, have a four-chambered heart.
Their constituent particles are different like Glucose of Starch and Fatty acids & Glycerol of Fats..,...
The answer for the question is B.
