B. some species die out when environmental changes occur
A. It has mass.
Air is matter, and can't be seen thus not all matter can be seen.
Any liquid or gaseous is matter (water, air, etc.)
Since it can be liquid or gaseous it doesn't have to maintain it's shape and size to be matter.
Answer:
b. false
Explanation:
Old world monkey and new world monkey do not have same dental formula . Dental formula is different for old world monkey as compare to new world monkey.
Old world monkey have 2.1.2.3 dental formula but on the other hand new world monkey have 2.1.3.3 dental formula .
Old world monkey have narrow nose but new world money have wide nose.Generally old world monkey are found in Asia and Africa that is why they called old world monkey.
