Science (English Medium) Class 11 - CBSE Question Bank Solutions for Biology

What would be expected to happen if dividing cells stop differentiating?

What would be expected to happen if a rotten fruit gets mixed with unripe fruits?

Why are the classification systems changing every now and then?

What different criteria would you choose to classify people that you meet often?

Given below is the scientific name of Mango. Identify the correctly written name.

Discuss how classification systems have undergone several changes over a period of time?

What is meant by modification of root? What type of modification of root is found in the

(a) Banyan tree

(b) Turnip

(c) Mangrove trees

Justify the following statements on the basis of external features

Underground parts of a plant are not always roots

Justify the following statements on the basis of external features

Flower is a modified shoot

Differentiate between Fibrous root and adventitious root

What is the following and where do you find them in animal body?

Ciliated epithelium

Describe various types of epithelial tissues with the help of labelled diagrams

Distinguish between Simple epithelium and compound epithelium

What is the average cell cycle span for a mammalian cell?

Distinguish cytokinesis from karyokinesis.

Describe the events taking place during interphase.

What is G₀ (quiescent phase) of cell cycle?

Why is mitosis called equational division?

Name the phase of the cell cycle at which the following event occurs:

Crossing over between homologous chromosomes takes place.

Analyse the events during every stage of cell cycle and notice how the following two parameters change.

1. Number of chromosomes (N) per cell
2. Amount of DNA content (C) per cell