In the leaf, the air spaces are present in the spongy mesophyll layer connect with air through stomata which is present in the lower epidermis of the leaf. Air spaces allows the exchange of gases like oxygen and carbon dioxide with the outer environment. Air spaces are interconnected with stomata and eventually open to outside.
His genotypes are X to the power of H and X to the power of h the second numbers are exponents so it goes X to H and X to h i hope this makes sense i couldn't make them into exponents but i tried :)