Weather : too cold or too hot due to climate change
Habitat can be destroyed due to natural phenomenon
Prey cut off by physical barrier
Lack of water
Eliptical (oval shaped), rather than Circular.
Answer:
It is skeletal muscle tissue also if you see my comment spread the word.
Explanation:
Sorry but Im doing this for points!
Explanation:
Answer:
ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.