Megaphylls and vascular tissue were required for ferns & gymnosperm evolution.
Dobzhansky and Mayr thought that the evolution of a new species is linked to the environmental changes. Geographic isolation happens before speciation and isolated populations evolve differences gradually as they adapt to the environment are the ideas that would follow the Dobzhansky-Mayr theory of speciation.
rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.
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Answer:
The Eocene Epoche coincides with the form of primates which are placental mammals.
Explanation:
The main characters of placental mammals contain large body,bigger brain that appear at that time from the fossil record.
True primates were evolve in 55 million years ago,at the beginning of eocene epoch.
These fossil records were found in North America, Europe, Asia.
The fossil were squirrel like size with grasping hand,feet, that helps them for climbling the tree.
The fossil record of primate that were found contain stereoscopic vision.
Answer: The two species coexist successfully because each occupies a different niche.
Explanation:
Two species of birds that are closely related to each other tend to live on the same tree because they occupy different niche. Two different species coexist as they have different food preferences.
Niche of the species can be defined as the the contribution of the species in the ecosystem and different organism contributes differently in the ecosystem.
There are many factors such as distribution, temporal and spatial distribution which can be different for both of the species.
So, the difference in the niche of the species enables them to coexists.