Pressure decreases with increasing altitude.
Three important characteristics such as a notochord, a dorsal hollow nerve cord, and pharyngeal gill slits, should appear at any stage of their life cycle. These are the characteristics of the chordates. Members of echinoderms share resemblance with chordates in presence of a notochord.
Many scientists agree that the universe is about 13 billion years old.
Answer:
To be honest, I'm not sure anyone would know the answer to that,
Explanation:
