Answer:
D. We know more about the Cenozoic era because this the most recent time period in the history of the Earth, and we have more information available to study.
Explanation:
The Cenozoic era is the era that is by far the best studied and known by the scientists. The main reason for this is that this era is the most recent one, and it is actually the era we live in. Because it is the most recent era, the Cenozoic is abundant with lot of evidence of what has happened in it. The fossil records are very rich as the fossils didn't had that much time to totally decompose. The rock layers are much younger, so they contain much more detailed evidence of the plant life, climate, changes in the environment. The oceanic crust is also in abundance, which is not the case with the other eras as the oceanic crust is constantly suducted.
- podría ser árboles
- flores como rosas, Girasol.Gardenia.Gerbera.Narciso.Dalia.etc
- could be trees
- flowers like roses, Sunflower.Gardenia.Gerbera.Narcissus.Dalia.etc
Las plantas terrestres o embriófitas son aquellas capaces de crecer y desarrollarse sobre la tierra. Son un clado o grupo monofilético descendiente de algas verdes y otras especies acuáticas, pero adaptado a la vida fuera del agua. Algunas embriófitas pueden ser semiacuáticas.
Terrestrial plants or embryophytes are those capable of growing and developing on land. They are a clade or monophyletic group descended from green algae and other aquatic species, but ada
Answer:
The main function of the RB protein is to inhibit the transition from the G1 to S phase. Its activity depends on its phosphorylation state: if RB is not phosphorylated (active state), it is bound to the transcription factor E2F, preventing its translocation to the nucleus and the activation of genes necessary for DNA synthesis; and if it is phosphorylated, by cyclin-CDK complexes, E2F is released and cell proliferation occurs.
Explanation:
Retinoblastoma (Rb) was the first tumor suppressor described and, as we know today, mutations in its structure determine a large number of cancers. Structurally, we speak of a large and multifunctional protein; which is organized in different domains. The activity of this protein is regulated, mainly, by phosphorylation at multiple sites described over the years and is involved in control mechanisms of the cell cycle, apoptosis and senescence.
