3 points 12. Fossils of horse like animals with 4, then 3, and then 2 toes are
examples of
homologous structures
vestigial structures
disruptive selection
transitional species

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

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

answer; both surfaces of the membrane are nonpermeable