Question 1: Define the term ‘tissue’?
Answer: A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function.
Question 2: How many types of elements together make up the xylem tissue? Name them.
Answer: The following four types of elements make up xylem tissue:
- Tracheids.
- Vessels.
- Xylem parenchyma.
- Xylem fibres.
Question 3: How are simple tissues different from complex tissues in plants?
| Simple Tissue | Complex Tissue |
|---|---|
| These tissues consist of only one type of cells. | These tissues are made up of more than one type of cells. |
| The cells are more or less similar in structure and perform similar functions. | Different types of cells perform different functions. For example, in the xylem tissue, tracheids help in water transport, whereas parenchyma stores food. |
| Three types of simple tissues in plants are parenchyma, collenchyma, and sclerenchyma. | Two types of complex permanent tissues in plants are xylem and phloem. |
Question 4: Differentiate between parenchyma, collenchyma, and sclerenchyma on the basis of their cell wall.
The differences between cell walls of parenchyma, collenchyma, and sclerenchyma are given in the following table:
