Your correct answer would be C. plant cells have mitochondria, a very important part of the cell, which means the plant cell needs structure to carry mitochondria throughout the cell to keep the flow of the process of photosynthesis, which brings energy to the plant.
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Free-living flatworms have developed a nervous system which helps them to sense the food. They have a head at one end of the body and each side of the head has sensory cells. These cells help them to sense chemicals and other movements around them.
While Parasitic flatworms don't have any nervous or digestive system as they live on the food digested by the host. They have special hooks attached to their head which help them to attach a host. They have developed some covering called 'teguments' which protect them from digestive liquids.
Answer: Plants are cloned to produce identical plants quickly and economically.
A desert biome, because since it can store water it wouldn't need a lot of water to survive, and deserts don't have very much rainfall.
