Respuesta :
The world would be very different in terms that there would not be many animals or there would be different animals. The reason for this is... if there are no photosynthetic plants the animals would have barely anything to eat so if these photosynthetic were not here humans might not even be alive due to lack of food. The main creatures would live in the sea to eat algae or similar.
The world would be very different if green plants had not evolved because the world is based on green plants. They provide food for almost all organisms: plants, animals, and microorganisms. They release oxygen into the atmosphere. They provide people with products including building materials, medicines, fuels, and fibers. They form fossil fuels, which are used by people all over the world. None of this would exist without green plants. The world would be much less colorful and diverse as well, because we would not have the great variety of plants, including trees and flowers.
