Unduplicated chromosomes are single chromosomes with a single line strand and one DNA molecule (if that's what you are looking for).
Thick rigid cell wall is not characteristic of a parenchyma cell
Answer:
a) Radiant energy --> chemical energy
The organs are known as Vestigial organs. The evolution from land-dwelling animal to the marine animals has led whales as well as dolphins, to lose hind limbs. The pelvic and leg bone serves no purpose in them and just provide the anchorage to muscles
