since the 1800s, what human activity has changed land use and led to the growth of large cities in many countries?

The answer would be d

The object would have to be spherical, orbit the sun, and be traveling in a path with other objects.

Each eukaryotic cell has a plasma membrane, cytoplasm, a nucleus, ribosomes, mitochondria, peroxisomes, and in some, vacuoles; however, there are some striking differences between animal and plant cells.