Answer:
It ended during the Mesozoic era
Explanation:
The Cretaceous period is the last of three periods of the Mesozoic era. The other two are Triassic, Jurassic.
During the Cretaceous period, more birds and plants appeared, as did new types of dinosaurs. Also, the climate on the planet was getting colder.
The entire duration of the Cretaceous period was approximately 79 million years.
Answer:
Early bacteria and plants released carbon dioxide as well as oxygen when they performed photosynthesis. because bacteria could have been aerobic back then and released carbon dioxide for the plants to use in photosynthesis.
<em>Hope this helps</em>
The Earth has been around for approximately 4.6 billions of years. Humans first evolved from I believe apes around 5 million years ago, with Homo Sapiens evolving around 2 million years ago or so. The current calendar system we use today, the Gregorian system (in most western nations like America) marks the year 0 as the year Jesus Christ was born, not when the Earth was formed. Years before Jesus' birth are marked as B.C., with the numbers getting higher the earlier you go. In the Japanese system, the year is marked by how long the current Emperor has been in power, making the current year (2017) Heisei 29 in traditional Japanese calendars.
The answer is B, the ocean affects their temperatures and helps act as air conditioning, cooling the area near it.
D. Changes
Hope this helps! :)