Questions and Answers

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

Find out what do the terms ‘algal bloom’ and ‘red-tides’ signify.

What is the nature of cell-walls in diatoms?

State two economically important uses of:
(a) heterotrophic bacteria
(b) archaebacteria

Organise a discussion in your class on the topic – Are viruses living or non-
living?

Give a brief account of viruses with respect to their structure and nature of
genetic material. Also name four common viral diseases.

What are the characteristic features of Euglenoids?

Give a comparative account of the classes of Kingdom Fungi under the following:
(i) mode of nutrition
(i) mode of reproduction

Plants are autotrophic. Can you think of some plants that are partially
heterotrophic?

What do the terms phycobiont and mycobiont signify?