Describe and explain how the small intestine is adapted for its function?
The small intestine contains microvilli which increase the surface area of the membrane. It also has a rich blood supply, this maintains the concentration gradient. The small intestine has a membrane which is one cell thick, this decreases the diffusion pathway. Mitochondria are present, they respire aerobically, providing ATP for active transport. These adaptations enable rapid diffusion of nutrients.
UI
Related Biology A Level answers
All answers ▸What does an oxygen-haemoglobin dissociation curve show?
Effect of temperature on enzyme catalysed reaction
How does eutrophication work?
In a population of deer there are two alleles, p and q. Individuals with allele p are faster than those with allele q and so are better at avoiding predation by wolves. Explain how natural selection will affect the characteristics of the deer population.