Question

autotrophs lack digestive system while herbivores and carnivores have one justify

Answer 1

Autotrophs prepare their own food so digestive sysytem is absent in them.Whereas herbivores and carnivores depend on plants and animals for food.Thus the complex food has to be broken down into simpler form so that it can be absorbed by their bodies.

Answer 2

Autotrophs are the organisms which use CO₂ as a main source of carbon, light as a source of energy and water as a donor of electron to fix carbon dioxide in organic compounds (carbohydrates). Autotrophs have no digestive system so they prepare their own food . Whereas herbivores and carnivores depend on plants and animals for food. It is therefore necessary to divide the complex food into simple forms so that its bodies can absorb it.