Answer:
Lungs and Endoskeleton.
Explanation:
Gills helps it live in water, and Scaly skin doesn't really apply
Answer:
Tundra
Explanation:
Ocean is the most stable biome, provides the majority of earths food and oxygen.
Rainforest provide 20% of earths food production. Also stable.
Grasslands although the don't get much rain it doesn't compare to the harsh weather that Tundra's face.
Tundra's is a very fragile environment. The freezing cold temperatures makes it a very difficult environment to survive in the winter, and plants and animals have a hard time coping with any extra stresses and disturbances. Therefore making it the least stable out of the rest listed.
Explanation:
True, if sedimentary rock is exposed to energy from the sun at Earth's surface for a long enough time, it can melt into liquid rock and form igneous rock. No, igneous rock forms under Earth's outer layer due to energy from Earth's interior, but sedimentary rock is only at Earth's surface.
<span>that would be 200,000 ybp</span>
The mantle is the most dense (pretty sure at least)
