NEET BIOLOGY

Detailed explanation-1: -Algae, along with plants and some bacteria and fungi, are autotrophs. Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis.

Detailed explanation-2: -Many algae are self feeders. They contain photosynthetic pigment that help in the autotrophic nutrition. They follow photo-autotrophic mode of nutrition as they make their own food using the sunlight and other photosynthetic apparatus.

Detailed explanation-3: -Autotrophs rely on either light or chemical energy to turn CO2 into organic carbon molecules. Photoautotrophs are photosynthesizing organisms such as algae and higher plants that use light for this process. Heterotrophs, in contrast, obtain their chemical energy from preexisting organic molecules.

Detailed explanation-4: -Photoautotrophic mode of nutrition is the process of formation of food by the process of photosynthesis. In this process, the organism used sunlight as a source of energy along with carbon dioxide and water.