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Which part of the digestive system absorbs the digested food into the bloodstream?

What type of waste is commonly generated from household kitchen?

During cellular respiration, which of the following is broken down into energy?

Following are the sources of commonly used natural fibres. Name them. [3 MARKS]


Fig (1) Fig (2) Fig (3)

What do you mean by glycolysis

Which foodstuffs are preserved by salting?

What is host and haustoria and are they interconnected?

Arrange the following events of binary fission in the correct sequence.

1. Segregation of genetic material copies to opposite side of the cells.

2. Division of cytoplasm.

3. Copying of genetic material.

4. Cell wall synthesis.

The vascular tissue which transports water and minerals in the plant is:

Question 4
Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test tube would have the highest concentration of $C{O}_2$?

Raj showed Sam the recently planted coriander and mint plants in his garden. Both plants belong to the category of ______________.

Define epiglottis. Where it is present?

Which of the following are protozoans?

Why are organic acids weak in nature?

Which of the following is used for the production of alcohol and wine?

The branch of biology which deals with the identification, nomenclature, and classification of organisms is called _____.

Which one of the following is not a method of food preservation?

Assertion (A): The Civil Disobedience Movement was different from the Non-cooperation Movement.

Reason (R): People in the Civil Disobedience Movement were asked not only to refuse cooperation with the British but also to break colonial laws.

Select the correct option from the given alternatives.

Choose the correct option for the diseases that spread through air.

Question 35 (a)

Write true (T) or false (F)

(a) Whittaker proposed five kingdom classifications.

All organisms in the animal kingdom is/are ___

Which of the following pair will exhibit diffusion?

Brisk walking makes a person breathe:

why reptiles have dry and scaly skin?

What is gastrointestinal tract?

Which of the following are unicellular organisms?

Now that Appu and Bholu had learned about the different types of blood vessels, they were curious to know how the flow of blood was maintained in these vessels. The doctor said it is maintained by a pump; Appu couldn’t understand what the doctor was trying to say. The doctor asked them to look at the diagram carefully.

They noticed something in the diagram which they had overlooked earlier. What could have they noticed __ ?

Fish swim in the water with the help of

What are mitochondria?

(a) In plants, water is transported through

(i) xylem

(ii) phloem

(iii) stomata

(iv) root hair

(b) Water absorption through roots can be increased by keeping the plants

(i) in the shade

(ii) in dim light

(iii) under the fan

(iv) covered with a polythene bag

The method used to obtain variety with high yield and other desirable characters is:

'Mammalian thymus' is mainly concerned with

Pick the hormone which is not secreted by human placenta.

What is the role of nucleus in a cell?

Question 22

Which of the following statements are true for eukaryotic cells?

(i) They do not have a nuclear membrane.

(ii) They have a well organised nucleus.

(iii) They have a nuclear membrane.

(iv) Blue green algae are eukaryotic cells.



(a) ii and iv

(b) ii and iii

(c) i and ii

(d) i and iv