How were large amounts of oxygen first introduced into earth's atmosphere?
a. they were deposited by comets that collided with earth.
b. they were released from the earth by erupting geysers.
c. they were produced as a byproduct of photosynthesis.
d. they were produced through atmospheric precipitation.

Which anatomical feature would you expect to find in the fossil remains of a nocturnal species?

Asap will mark geography final plz ! what are the benefits of international aid? (give me the right evidence )

England is a small country. why is english spoken in so many places worldwide? a. england colonized many places throughout the globe. b. the english language is the easiest language to learn. c. england is located near the prime meridian, making it a popular tourist destination. d. because england is an island nation, it has had many visitors.