Which of the following displays objects that are smaller than a planet?

a stars and comets
b stars comets and asteroids
c asteroids meteors and stars
d asteroids comets and meteors

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

What is the period of cell life when it is conducting

The smallest parts of these that retain their original properties are called