Answer: its CO2 for the first one
Explanation:
Three scientists are credited with the development of cell theory. Matthias Schleiden observed that all plants were made of cells; Theodor Schwann observed that all animals were also made of cells; and Rudolf Virchow observed that cells only come from other cells.
Small intestine is modified due to the presence of micro villi which has ability to increase it's size
Answer:Homozygous reccesive
Explanation: