What is a stationary front? A:when a cold air mass and a warm air mass meet and don't move

B:when a warm air mass doesn't move

C:when a cold air mass remains in place

D:when two cold air masses meet and don't move

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: