List of practice Questions

Distinguish between: 

1. afferent neurons and efferent neurons 
2. impulse conduction in a myelinated nerve fiber and unmyelinated nerve fiber 
3. cranial nerves and spinal nerves.

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

Define a taxon. Give some examples of taxa at different hierarchical levels.

Can you identify the correct sequence of taxonomical categories?
(a) Species → Order → Phylum → Kingdom
(b) Genus → Species → Order → Kingdom
(c) Species → Genus → Order → Phylum

Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.

Define and understand the following terms: 
(i) Phylum 
(ii) Class 
(iii) Family 
(iv) Order
(v) Genus.

Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

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

How are viroids different from viruses?

State two economically important uses of:

1. heterotrophic bacteria
2. archaebacteria

What is the nature of cell-walls in diatoms?

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

Describe briefly the four major groups of Protozoa.

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

What do the terms phycobiont and mycobiont signify?

Give a comparative account of the classes of Kingdom Fungi under the following:

1. mode of nutrition
2. mode of reproduction

What are the characteristic features of Euglenoids?

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

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

What is the basis of classification of algae?

When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?

Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.

Write a note on economic importance of algae and gymnosperms.