Biology

This chapter describes the concept of the cell, which is the fundamental unit of life. It was first discovered by Robert Hooke when he observed a slice of cork that looked like a honeycomb.

This chapter discusses the plant and animal tissues. Here, we will discuss animal tissues like epithelial tissue, connective tissue, fibrous tissue, agitate tissue and plant tissues like meristematic tissue, permanent tissue.

This chapter discusses the basis of classification of organisms, classification and evolution of organisms, the hierarchy of classification, Plantae kingdom, Animalia kingdom and nomenclature.

This chapter discusses the cause of diseases and their prevention methods. The health of all organisms depends on their surroundings or their environment. A disease may have more than one cause. Diseases can either be infectious or non-infectious.

This chapter describes the natural resources available on Earth. Water covers 75 percent of the Earth’s surface. The air is composed of nitrogen, oxygen, carbon dioxide and water vapor. It also describes the biogeochemical cycle.

This chapter discusses the various methods to improve food resources. Crop variety improvement, crop production improvement and crop protection management are discussed briefly. It also discusses animal husbandry.