A sample of polyN ethylmethacrylamide (PNEMAM) has a LCST of 58C. A mixture of linear PNEMAM with water when implanted inside the body will be a: a. clollapsed gel
b. solution
c. fully expanded gel
d. inverse micelle
e. semi-IPN

The correct answer is - c. fully expanded gel

Explanation:

PolyN ethylmethacrylamide (PNEMAM) is a negative temperature based hydrogel, these type of gels have LCST or lower critical solution temperature. Under the LCST this polymer get swollen and above the LCST it contracts.

In the question, it is mentioned that this hydrogel has a LCST of 58-degree celsius which is implanted in the human body that normally has a temperature of 37-degree celsius which is below the LCST so the polymer would expand or swell.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.