Answer:
B. Mitochondria
Explanation:
The mitochondria are the organelles that supply energy to the cell. They are also known as the powerhouse of the cell.
That it is the same substance and yet has a different density?
The answer was D..............I DID IT AND GOT IT RIGHT
It involves a physical exchange of segments from homologous chromosomes. Because of crossing over, alleles originally located on the same chromosome can end up on different chromosomes and be inherited independently
Answer: Earth's shadow extends about 870,000 miles (1.4 million km) into space
Explanation:Like all shadows, the shadow of Earth is always opposite the sun. So you'll want to look eastward after sunset for the shadow (or westward before sunrise). Earth's shadow is the dark blue line above the horizon in this photo by Jörgen Andersson in Sweden. View larger.
