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: -Autotrophic nutrition is the type of nutrition where organisms synthesize their own food. They are called producers in the ecosystem. They use sunlight, water, and carbon dioxide to synthesize food.

Detailed explanation-4: -Algae belongs to kingdom Plantae. All organisms in this kingdom are autotrophic i.e., they can produce their own food through a process called photosynthesis.

Detailed explanation-5: -All algae and plants are photosynthetic autotrophs. Algae are difficult to define because the term describes such a wide diversity of organisms. Many species of algae, like larger seaweeds and giant kelp, appear similar to plants (Figs. 2.3 C and D). However, these algae are not true plants.