List of top Biology Questions

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.

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

1. mode of nutrition
2. mode of reproduction

What do the terms phycobiont and mycobiont signify?

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

Describe briefly the four major groups of Protozoa.

How are viroids different from viruses?

What is the nature of cell-walls in diatoms?

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

Sharks are said to be ammonotelic animals Sharks can retain considerable amounts of ammonia in their blood

Why do you think the zygote is dormant for sometime in a fertilized ovule?

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.

Differentiate between: 

1. Myelinated and non-myelinated axons 
2. Dendrites and axons 
3. Thalamus and Hypothalamus 
4. Cerebrum and Cerebellum

Explain the following processes:

1. Polarisation of the membrane of a nerve fiber
2. Depolarisation of the membrane of a nerve fiber
3. Transmission of a nerve impulse across a chemical synapse.

Give comparison between the following: 

1. C₃ and C₄ pathways 
2. Cyclic and non-cyclic photophosphorylation 
3. Anatomy of leaf in C₃ and C₄ plants

Figure 11.10 shows the effect of light on the rate of photosynthesis. Based on the graph, answer the following questions: 

1. At which point/s (A, B or C) in the curve is light a limiting factor? 
2. What could be the limiting factor/s in region A? 
3. What do C and D represent on the curve?

Draw labelled diagrams of the following: 

1. Neuron 
2. Brain

Briefly describe the structure of the Brain.

Study the following lists. Identify the correct match.

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

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

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

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

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

What do we learn from identification of individuals and populations?