The protein inside (a) red blood cells that carries oxygen to cells and carbon dioxide to the lungs is (b) hemoglobin. Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen.
Answer: boundaries, movement, responsiveness, digestion, metabolism, excretion, reproduction, and grow
Answer: It is Glucose and Galactose
The "Receptor site" is the answer.
They can only estimate because- 1) they can't estimate how fast they can brood 2) they don't know if their predators will reproduce fast 3) they don't know if people will stop killing and destroying habitats 4) They don't know where all the species are, they might have escaped into other places fit for them to live