Hi. excuse me sorry but i cant see your question. do you think you could post it again, please?
thank you
Answer:
A Mutation is when a DNA gene is damaged or changed in a way that changes the genetic message carried by that gene.
Explanation:Mutations are sometimes good and sometimes bad it can also cause genetic variation which increases the survival of a species
Answer:
oxygen gas
Explanation:
because oxygen is needed for life on Earth
Incomplete question you must include the choices.
nervous system is the communication system of the body.
Homologous pairs, Eg. X and Y
One pair in paternal and the other in maternal, obtained during Meiosis.
