Answer and Explanation:
During the whole biota history, there occurred extinctions due to different reasons.
During the Cretaceous, which took place between 145-65 million years ago, there occurred a massive extinction that eliminated most of the species on the Earth. Many of the characteristic groups of this period were affected. Dinosaurs, Plesiosaurs, Ammonites, Tricodonts, Cycas, Gynkgos, Conifers, the recent angiosperms, birds, and mammals.
The extinction was caused by the volcanic eruptions, and the unusual fall of many different asteroids, which caused important changes on the Earth´s surface. The consequent climatic change was what ended affecting all the species directly. The extinction was gradual, although it occurred in a short geological lapse of time.
Answer:
See Below
Explanation:
The process by which DNA is copied to RNA is called transcription, and that by which RNA is used to produce proteins is called translation.
Active transport requires energy to transfer material in and out of the cell.
Passive transport is automatic and does not require energy.
Examples of Active: Endocytosis and Exocytosis.
Examples of Passive: Facilitated Diffusion, Simple Diffusion, and Osmosis.
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Answer:
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Answer:
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Explanation:
