Answer:
basically gas exchange happens in alveoli where Oxygen enters in RBC and co2 is released where oxygenated and deoxygenated bloods get seperated
Mosasaurs were large marine reptiles that resembled a cross between a crocodile and a giant iguana. Completely dying out of these can be the illustration of extinction.
<h3>What is extinction?</h3>
Extinction is the dying out of a particular species. Extinction has an important role in evolution as it opens opportunities for emerging of new species.
The mosasaurs have completely died out after a big asteroid impact caused Earth to drastically change. This can illustrate extinction.
Thus, the correct answer is extinction.
For more details regarding extinction, visit:
brainly.com/question/14480057
#SPJ1
Oxygen Cycle just try looking it up next time ok
Arachnids are spiders,
spiders have 8 legs,
a pair is 2,
so, arachnids have 4 pairs of legs.
I would say probably the age of the habitat
