What are mutations?

a. changes in nucleotides of a dna molecule that affects the genetic message

b. repairs of damage to dna molecules by specialized enzymes

c. removal of damaged dna nucleotides by enzyme molecules

d. reduction in the rate of replication of dna due to regulatory mechanisms.

the statement is true

there is no stairs in bungalow

explanation:

poof

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.