Which forces can change a rock into a metamorphic rock? Check all that are true.

weathering

pressure

chemical change

erosion

heat
need the answer ASAP.

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 do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different

Many humans consume both plants and animals. these humans are considered to be which of the following? herbivores carnivores omnivores