Explore topic-wise InterviewSolutions in .

(a) What is a neuron? Draw a labelled diagram of a neuron.

(b) What is a synapse? What happens at the synapse between two neurons? How are the messages carried across a synapse? Explain with the help of a labelled diagram.

Which of the following human activities does not cause a decrease in the level of groundwater?

What are reflex actions? Give two examples. Explain a reflex arc.

Name the following :

(a) The fluid that is present inside and outside the brain.

(b) The junction between two nerve cells.

(c) The part of the brain which is concerned with memory.

(d) The part of the human brain which controls body temperature.

Name and describe very briefly, the stages in the development of human embryo.

Which one of the following is not a part of the excretory system?

What are systematic and non systematic antacids with explination

5 marks

Draw the structure of a neuron and explain its function.

Which one of the following is a characteristic NOT related with the suitability of the roots for absorbing water?

(a) Tremendous surface area

(b) Contain cell sap at a higher concentration than the surrounding soil water

(c) Root hairs have thin cell walls

(d) Grow downward into the soil

Question 26

Which statement is not true about thyroxin?



(a) Iron is essential for the synthesis of thyroxin

(b) It regulates carbohydrate, protein and fat metabolism in the body

(c) Thyroid gland requires iodine to synthesise thyroxin

(d) Thyroxin is also called thyroid hormone

Give any two ways in which we can protect ourselves from disease causing germs?

Identify the most appropriate statement about the pituitary gland.

Question 18

Nerve cell does not contain



(a) Axon

(b) Nerve endings

(c) Tendons

(d) Dendrites

Question 38
Why is it that fertilization cannot take place in flowers if pollination does not occur?

Question 02(iii)

Name the following:

A vitamin required for maintaining good eyesight.

Roshan wants to build his muscles and thus joined a gymnasium for it. What changes should Roshan make in his diet to build strong muscles?

Indicate the flow of energy in an ecosystem. Why is it unidirectional? Justify.

Branch of biology in which study of the enzyme related to some prokaryotes and eukaryotic microbes, protein, etc. is called ___

What is the causative agent of Tuberculosis?

OTEC is the process of

_________ have same genes at the same _____ but can have different _______.

The steps in a starch test have been listed below.

1) Place the leaf in methylated spirit and heat it over a water bath

2) Pour iodine over it

3) Place the leaf in water

4) Place the leaf in boiling water

Which of the following correctly lists the order in which the steps are to be carried out.

Notice the following sentence patterns.

1. And who art thou? said I to the soft-falling shower.

2. I am the Poem of Earth, said the voice of the rain.

3. Eternal I rise

4. For song…duly with love returns

Rewrite the above sentences in prose.

In internal fertilsation, there is always ………………………………….

Draw a neat, labelled diagram of sparged-stirred-tank bioreactor. What is its application? [3]

Give one example of the movement of a plant part which is caused by the loss of water (or migration of water).

In marine-mammals like whales and dolphins, the limbs are modified into __which are used as oars to swim in water.

Which organ acts as a pump in the circulatory system ?

The number of pairs of autosomes in a human cell is __.

The changes in shape of bird beaks [Darwin’s Finches- as shown in the picture] is an example for

Complete the following statement by filling in the blank from the choices given in the brackets.
An anticoagulant present in the blood is....
(heparin, hirudin, thromboplastin, calcium).

In evolutionary terms, we have more in common with :
(a) a chinese school boy
(b) a chimpanzee
(c) a spider
(d) a bacterium