(a(i))[1]
State the role of tissue X shown in Fig. 5.1.
(a(ii))[1]
Describe how the arrangement of tissue X in the trachea is different from the arrangement shown in Fig. 5.1.
(a(iii))[2]
Describe how epithelial tissue Y is adapted for its function.
(b(i))[1]
Describe the difference in surface area to volume ratio between the adult elephant and baby elephant shown in Fig. 5.2.
(b(ii))[3]
Suggest why animals such as elephants need a gas exchange system.
(b(iii))[4]
Collagen fibres are built from collagen molecules. Describe the structure of a collagen molecule.
(b(iv))[1]
The foot cushion is very strong and can withstand very large forces acting on it because the elephant has a large mass. Suggest how the structure of a collagen fibre can help the cushion resist these large forces.