One difference between monotremes and other types of mammals is

a) monotremes are viviparous
b) monotremes do not secrete milk
c) monotremes secrete milk through well-developed nipples
d) monotremes secrete milk through pores on the surface of the mother's abdomen

d) monotremes secrete milk through pores on the surface of the mother's abdomen

Explanation:

Monotremes are a specific group of egg-laying mammals (oviparous). They do not give birth to their young ones like other mammals. Thus, other mammals are viviparous. Although monotremes lay eggs but like other mammals secrete milk through mammary gland openings in the skin. Examples of monotremes are echidna and the duck-billed platypus.

b. to discover aspects of the natural world.

hopefully i .

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.