Which of the following is an example of microevolution?

a caterpillar changes form into a butterfly.
a population of birds with red feathers slowly changes to having blue feathers.
a dinosaur species evolves over time into a bird species.
a black cat has kittens with white spots.

Could someone me with number one you

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3

This is the nitrogenous base only found in rna