Answer:
Nitrogen
Explanation:element found in all organic compounds carbon
element found in proteins but not carbohydrates or lipids nitrogen
three parts of a nucleotide phosphate, sugar, base
element found in nucleic acids, but not proteins, carbs, or lipids phosphorus
Energy in Producers flows from the Sun to the chloroplasts to the mitochondria.
The answer is Oak Tree ---> leaf ---> Guard Cell ---> Chloroplast because guard cells are are specialized cells in the epidermis of leaves which means leaves are more complex and Chloroplasts are less complex than guard cells.
Natural Selection helps animals survive in their habitats and they have adaptations to help them survive better.
Scientists first discovered cells through the microscope
