all animals have
It is a genetic adaptation; without nucleus more space for hemoglobin is free. And hemoglobin is the carrier of oxygen.
All animals that are vertabrates, or have a back have hemoglobin in their blood.
True
Hemoglobin is not a living thing. Hemoglobin is simply a molecule capable of temporarily binding with oxygen and carrying that oxygen to where it is needed, then giving it up and returning to be reoxygenated. Hemoglobin is present in red blood cells, but does not metabolize, neither does it generate nor utilize energy itself, generally considered parameters that define 'living'.
Multicellular organisms do not have a nucleus; rather they have many nuclei. Most cells in an organism have a nucleus (with a few exceptions like red blood cells).
yes all animals have a nucleus, including plants
just to accommodate more hemoglobin for better oxygen transport
All fungi are eukaryotes, like animals having a nucleus and mitochondria in their cells but lacking chloroplasts.
Yes. They have no nucleus however.*RBCs start out nucleated but lose the nucleus as they mature.also normal cells are not red. rbcs get their red color from a chemical called hemoglobin. but they start out as a pale color until the hemoglobin is exposed to oxygen:)
No, monerans do not have a nucleus. They, also, are unicellular, having one or a couple cells, too.
During the final phase of maturation, the nucleus is extruded from the red blood cell to make more room for hemoglobin molecules.
the color of a animals nucleus is purple.