English Medium Class 9 - CBSE Question Bank Solutions for Science

Distinguish between tracheids and vessels.

Explain different types of elements present in phloem.

What are tracheary elements?

Write the functions of parenchyma.

What is the difference between parenchyma and collenchyma?

What is the differences between collenchyma and sclerenchyma?

Name the different types of elements found in the xylem.

What are the functions of xylem?

What are the functions of phloem?

Explain how sieve tubes manage to be living?

The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.

1. Name the substances (i) X (ii) Y and (iii) Z.
2.  What is the process of conversion of X into Y known as ?
3. At which temperature X gets converted into Y ?
4. What is the process of conversion of X into Z known as ?
5. At which temperature X gets converted into Z ?

What are different types of tissues in plants? Describe simple tissues.

What is simple tissue? Classify and explain its different types with suitable diagram.

What is simple tissue? Classify and explain its different types with suitable diagram.

What is simple tissue? Classify and explain its different types with suitable diagram.

What do you know about complex tissue? Classify and explain its different types in plants with suitable diagrams.

Mention seven categories of hierarchical classification.

Give distinguishing features of plants and animals.

Write a note on lichens.