Answer:
having more air spaces around the spongy mesophyll cells
Answer:
they are not living because when they fell from the tree they stopped getting water. so it depends on how long ago they fell.
This is because these species would not have been studied much or documented in the past because of their inaccessibility. Many species may be unknown to science, but that does not mean they are unknown to humans. Traditional knowledge within rural areas may have knowledge of these species, but the remoteness of these areas means that universities and research centres may not have sent scientists into these areas.
Answer:
the later stages are small and the tool materials are of better quality than the previous stages.
Explanation:
The stone scrapers and the choppers found at the site of Zhoukoudian points out the fact that Peking men devised several tools for various purposes and to accomplish different tasks. The stones and the bones used to make the tools used to be charred by using the fire. This also indicates that the Peking men had discovered the uses of fire and they used fire for various activities.