19. at the end of this period, 96% of all life went extinct. this set the stage for reptiles to really take hold in the next era. * cenozoic carboniferous permian quaternary 20. this is the first period of the mesozoic era. * triassic jurassic cretaceous permian 21. this was the era of "ancient" life and was divided into six periods. * precambrian paleozoic mesozoic cenozoic 22. which era spans the least amount of time on the geologic time scale? * precambrian paleozoic mesozoic cenozoic

1- Option (C)

2- Option (A)

3- Option (B)

4- Option (D)

Explanation:

By the end of Permian, about 251 million years ago, a huge mass extinction event has taken place which has wiped out nearly 96% of all life forms that existed on earth. The forest-covered area on earth was destroyed completely which took more than 10 million years to replenish. This was the largest mass extinction event in the earth's geological time and is marked by the Permian-Triassic extinction boundary.

The Triassic is the first period that belongs to the Mesozoic era that started from about 251 million years back and ended by almost 200 million years back. It was the time during which the life outside the marine water started to expand and diversify. By the end of Triassic, another mass extinction occurred due to the rapid and widespread eruptions of volcanoes, which resulted in the emission of a huge amount of gases in the atmosphere that unfortunately led to the decrease in the population of numerous species.

The Paleozoic era of "ancient" life and was split into six different periods starting from Cambrian, Ordovician, Silurian, Devonian, Carboniferous and ending at Permian. A lot of events and the evolution of marine organism has taken place during this era.

The Cenozoic era has the least amount of time and is about 65 million only, which is quite less in comparison to the other two eras. This is the era that started after the removal of dinosaurs from the earth in the Cretaceous-Paleocene mass extinction boundary.

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

b exhibiting favoritism toward the kikuyu people.