Why is the nucleus important to a cell? 1 The nucleus organizes the DNA and allows for careful regulation of gene expression.
2 The nucleus regulates the cell’s interaction with its surroundings.
3 The nucleus transports proteins out of the cell.
4 The nucleus protects the cell.

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

Why is the sun hot and can burn you if you get to close

What is a scientific experiment? (3 points) a statement that tries to answer a scientific question a rigorous procedure that produces scientific data a final decision that describes a scientific model a collection of data that generates a scientific observation