This means that a single carbon atom can form up to tetravalent bonds with other atoms
Answer:
B
Explanation:
As the moon rotates around the Earth the angle of light given off from the sun changes.
Answer:
B) venous blood and aveolar
Explanation:
Partial pressure of carbon dioxide in the aveolar is the lowest, it is 40mmHg (millimetre mecury ) while the partial of carbon dioxide in venous blood is the highest at 45 to 50 mmHg (millimetre mecury)
Apparent magnitude : How bright a star appears to be
Absolute magnitude : How bright the star actually is
I think the answer is : A. close to earth
The stars only seems to be bright because its radiated from a close distance
hope this helps
The correct answer to your question is the last one; how species change over time.
Hope that helps!
