Answer:
An index fossil is also known as guide fossils or indicator fossil. They are fossils used to determine and identify geologic periods.
The main characteristics of an index fossil include :
1.It must be distinctive.
2.It must be widespread.
3. It must be abundant
4. It must be limited in geologic time.
Due to trends and studies of most fossil-bearing rocks being formed in the ocean, the major index fossils are mostly marine animal or plant organisms.
Granum
The light-dependent reactions take place in the thylakoid membranes in the granum (stack of thylakoids), within the chloroplast. ... Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.
It starts the energy chain withen the food chain
Answer:
energy
Explanation:
energy allowed organisms to do work.
Ok that’s easy airplanes or cars durrrrr