Why are there no samples of rocks from the early Precambrian era? O A. They have undergone metamorphosis.
O B. They are buried under sediment.
O C. All of them formed under volcanoes.
O D. All rocks were molten in that time period.

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes