AP BIOLOGY

Detailed explanation-1: -All humans and animals depend on plants, either directly or indirectly for obtaining nutrients. Plants being the primary producers trap solar energy and prepare their food through photosynthesis (autotrophs). Plants are the first living organisms to harness sun’s energy.

Detailed explanation-2: -Answer 3: Most organisms either directly or indirectly use energy from the sun to survive, but not all of them. Plants and some microbes use the energy from the sun to perform photosynthesis. In photosynthesis, light energy is used to combine CO2 in the air with water to make sugars and oxygen.

Detailed explanation-3: -Explanation: All nutritional energy comes from the Sun: plants use chlorophyll to photosynthesize the Sun’s energy into plant energy, and then animals either feed on plants for that energy or they feed on the animals that have eaten that plant energy.

Detailed explanation-4: -All living organisms are inter depend on plants because plants take the food from sun by photosynthesis(auto trophs) and make them as food and animal which eat plants and indirectly take the sunlight and glucose (depend on the plant are called herbivores .

Detailed explanation-5: -Plants can synthesise food for themselves but animals including humans cannot. They get it from plants or animals that eat plants. Thus, humans and animals are directly or indirectly dependent on plants. Plants are the only organisms that can prepare food for themselves by using water, carbon dioxide and minerals.