How does the respiratory system with homeostasis?

If a checkpoint detects damaged dna, the checkpoint may

What does it mean for an allele to be dominant?

Earths energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your homes electricity, and explain why you chose that source. can someone give me some ideas, i’m kinda confused.