How have frogs evolved from 500 mpa to 250 mya?

Which measure of an earthquake depends on how close you are to the focus?

Do plants make food in their stems flowers roots or leaves?

Which statements about a food chain are true? choose all answers that are correct. a.plants are the first living organisms in food chains on land. b. the plants in a food chain are called herbivores. c. all food chains on land begin with energy from the sun. d. carnivores in a food chain eat only plants.