Answer:
Mutations in genetic code occurs when DNA is being duplicated.Any changes in the base pairs leads to mutations by trasition or transversion. Change in amino acid leads to change in sequence and thus, mutation. This si carried on to new generation, if it takes place in germ cells.
Smooth muscle cells are found in the walls of hollow organs
Earth's orbit and climate change
True, organisms take in nitrogen and carry out life processes.
Answer:
D
Explanation:
This is because the atmosphere is refreshable and makes breathing so conducive.
