AP BIOLOGY

Detailed explanation-1: -Plants use a process called photosynthesis to make food. During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch.

Detailed explanation-2: -Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.

Detailed explanation-3: -Plants use glucose for respiration. They break down glucose and the chemical energy thus released is used by the plant for other cellular activities. Glucose is also used to prepare starch and cellulose. It is used to produce oil or fat to store in seeds.

Detailed explanation-4: -Glucose provides plants with needed food through a process called photosynthesis. This process helps plants convert the energy they take in from sunlight into sugar to help nourish the plant. Photosynthesis occurs when carbon dioxide, water and sunlight are combined. Plants use these to form glucose and oxygen.

Detailed explanation-5: -The glucose produced in photosynthesis may be: Used for respiration (both aerobic and anaerobic) Converted into insoluble starch for storage in the stems, leaves and roots. Used to produce fat or oil for storage (especially in seeds)