Q.1.
Carbon dioxide enters plants mainly through the...
Q.2.
Exchange surfaces are usually very...
Q.3.
In animals, uptake of materials is quicker if there is a rich network of...
Q.4.
Exchange surfaces are generally involved in the...
Q.5.
Mineral ions enter the plant by active transport through the...
Q.6.
Diffusion is faster across an exchange surface if the concentration gradient is...
Q.7.
During gaseous exchange, which two gasses are involved?
Q.8.
These are found in large numbers in the lining of the small intestine.
Q.9.
Within leaves, the gasses enter and leave through specialized pores called...
Q.10.
Alveoli are found in the...