Hemoglobin is a quaternary protein structure on a red blood cell involved in oxygen transport. Hemoglobin A1 has two a-chains and two ß-chains. Hemoglobin A2 has two a-chains and two d chains. In spite of the structural differences,
both hemoglobin Al and A2 perform the same functions.
Which of the following statements explains why both hemoglobin types perform the same functions?
O The amino acid sequence in the delta chain is not critical to oxygen transportation.
O Only the alpha chains are important for oxygen transport.
O The delta chains are nonfunctional and the body compensates with more red blood cells.
O The amino acid sequences changed the alpha and beta chains because of molecular interaction.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest

yes? sounds right, but you didn’t ask a question.

answer; synapse;