B. 245 million
from the end of Carboniferous Period to the beginning of the Triassic period
Villi increases the surface area to help with absorption and digestion. Micro-villi form a brush border that vastly increases the surface area of the plasma membrane so larger amounts of nutrients can be absorbed.
They need sleep for energy for the day.
people need sleep to have better memory. if we dont get enough sleep, we would not be able to do tasks that need psychical energy.
its the same thing with animals: they might not have that much energy to do stuff if they dont get enough sleep.
Answer:
Genetic variation will increase because of a new habitat and food source.
Explanation:
Regardless of how much CO2 they soak up, wild plants are a key ally in our quest to make civilization sustainable. Rather than just expecting them to protect us, we should focus on protecting them — not just because they might soften the blow of climate change, but also because plants offer many other "ecosystem services" that benefit humanity. Beyond absorbing CO2, for example, plants can release atmosphere-cooling aerosols, clean up toxic fumes and produce life-saving medicines.
"I really hope people can appreciate how much nature has been doing for us,". "Nature is trying to mitigate the consequences of our actions. We should appreciate that and protect plants. There are so many plant species that are doing a service to mankind, yet we have not been studying them. We don't even know how they are doing in the natural environment. If they go extinct, we would miss a lot of knowledge that could have been gained. We need to protect plants and protect nature."
