What is nerve fibre? Name the two main types.

What is satellite DNA? Name their two types. Mention the basis for their classification.

What is cancer? Explain three main types of cancer. Name at least two danger signals of cancer.

What is a gland? Name the two types of glands

Name two main gases of air.

What is a semiconductor? Describe the two main types of semiconductors and contast their conduction mechanism.

What is connective tissue? What are its main types.

Name two types of cells.

Name the four main types of tissues.