Energy - needed for all of the traits of life. Without energy an organism could not survive. Food and Sunlight)
Water - Every living thing needs a constant supply of water. Our body is 70% water and our cells use water to carry out specials tasks like breaking down food. Plants need water to make their own food.
Oxygen - Living organisms use oxygen in order to release energy from food. We get Oxygen from the air what about fish, where does their Oxygen come from?
Minerals - Chemicals found in the water soil, and air and can not be made by living things, however living things need minerals to survive. (we get them from eating plants and animals, plants get them from the soil.)
Ex: Calcium and Potassium
Where does life come from? Section 1-3 H.W. pg. 21 ques.1-4
At first scientists believed that living thing things came from non living things.
This theory was called spontaneous generation.
Then in the mid 1800’s a man named Pasteur disproved this theory and it was replaced with a stronger theory called biogenesis , which states that all living things can only come from other living things.