How do red blood cells help animals?

The function of RBCs is to carry oxygen to the tissues at pressures sufficient to permit its rapid diffusion. Explanation:

to carry oxygen from lungs to tissues

Explanation:they contain haemoglobin, which has Fe that binds to the oxygen to be carried

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation:

2%? i tried finding the exact sorry if it's not 100% correct ; -;