Answer:
The skin has 4 main layers, Epedermis, Derma, Hypodermis, and the Subcutaneous layer. Each layer is composed of certain material and tissue. On the most outer layer, there is hair, nerves, and glands (of sweat). Down further are veins, and arteries. The adipose tissue makes up the hypodermis layer.
The answer for your question b
They basically mean the same thing. An invasive species is an non-native species. An exotic species is also an non-native species.
Answer:
Ecosystem.
Explanation:
Archaea play an important role in ecosystems with organisms that derive or produce energy from oxidation of methane. Many of Archaea are bacteria which are often a major source of methane in such environments and they can play a role as primary producers. Archaea is important for scientists because it has unique ecological roles and can also generate energy differently i.e. responsible for producing biological methane which no eukaryotes or bacteria can do that.
