We eat food for energy. What is the source of energy for this food chain? A) the sun
B) the grass
C) decomposers
D) all the animals

Which describes radioactive decay of a substance

Explain why phospholipid molecules form a bilayer. (3 marks)

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