20.4 21.3 are the correct answers
Answer:
What is the name of this website
or the book?
Answer:
this is a common ... saw incredible similarities between birds and the theropod dinosaurs (especially ... Like all other reptiles, birds have scales (feathers are produced by tissues similar to ... for theropods are often more serious for the "thecodont" pseudo-hypothesis.
Explanation:
The horsehoe crab because it was one of the first animals to ever live on earth
Answer:
c the comet turns into a shooting star and is gone forever
