Their are both different substances
Villi occur in the digestive system, helping to move food through your system and absorbing nutrients.
Answer:
The chloroplast is involved in both stages of photosynthesis. The light reactions take place in the thylakoid. There, water (H2O) is oxidized, and oxygen (O2) is released. The electrons that freed from the water are transferred to ATP and NADPH
A verticle group (up and down) is called a GROUP. The horizontal groups (left to right) are called PERIODS
Chlorophyll absorbs energy from sunlight and it also absorbs the red and blue colors so it reflects it as green.
