The circulatory system and respiratory system are protected by your skin, muscles, and ribs.
Answer:
D
Explanation:
prokaryotes are things like bacterial cells , they have no true nucleus just a long ring of dna.
Eukaryotes are things like animal cells they have a nucleus (opposite of prokaryotes)
The lion is most similar to a tiger, because both are members of the same genus. The gray wolf and coyote belong to different genera, the aardwolf belongs to a different family, and the whale belongs to a different order.
Answer: Nuclear fusion
Reasoning: most of a stars life is in the main sequence phase. This is the phase where nuclear fusion turns hydrogen into helium.
Answer:D To see and help the body respond to the environment
Explanation: