Almost all cells in our body have a similar genome, but why they are so different in morphology and function? e. g. nerve cell vs muscle cell.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Why is excretion necessary to maintain homeostasis?

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?