Answer:
organ systems
Explanation:
cells combine to form tissues, tissues combine to form organs, and organs combine to form organ systems such as the digestive system.
D) competition for resources is greater
The more in the population, the more resources needed. If they run out of resources, the population decreases. They are competing to stay alive. I hope this helps!
Explanation:
production of living organism from nom living matter is known as spontaneous generation.
Cant you just look this stuff up
