The table below shows the number of foot bones in some horse fossils. Horse Fossil Record
Horse Fossil Number of Foot Bones
P 19
Q 17
R 24
S 13

Ancient horses had more bones in their foot then present-day horses. The present-day horse has 11 foot bones. What is the correct order of evolution of the horse starting from the youngest fossil?
Q P R S
S R P Q
S Q P R
R P Q S

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

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.