Question

Cycle test

                                                           Subject: Biology

Date: 17/05/2021                                                                                             Marks:25

Class: IX                                                                          

                              PART-A. (6x1=6)

1. The _______ are the largest of leococytes.

a) neutrophil   b)monocyte.  c) basophil   d) lymphocyte

2. Answer in a word: valve present at the base of aorta -

3. The normal human heartbeat rate is about _______ times per minute.

4. State true or false: Active transport does not require ATP-

5. Match the following:

a) Leucopenia.        -       phagocyte

b) Platelets.             -       blood cancer

c)Monocyte.            -      Thrombocytes

d)Leukemia.            -       decrease in leucocytes  

6. Assertion and reasoning

Assertion(A): person with "O blood group" are called universal donar as they donate blood to all

groups.

Reason(R): Antibodies are present in persons with O blood group. 

 

                                     PART-B:(any 2)    (2x2=4)

7. What is imbibition?

8. Define pulse.

9.What is transpiration?Give any two importance.

                                    PART-C. (any 2) (2x4=8)

10.Aorta is the largest artery of the blood. Give reason .

11.Enumerate the functions of blood.

12.Differentiate between systemic circulation and pulmonary circulation.

                                    PART-D.(any 1) (1x7= 7)

13. Explain one mechanism of translocation of sugars.

                               (Or)

14.Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention it's functions​

Answer 1

Explanation:

1. Monocyte

2.Arotic

3.60-100 per minute

4.false

7.the absorption of one substance by another, in particular the uptake of water by a plant or seed.

"the imbibition of water through the membrane"

8.a rhythmical throbbing of the arteries as blood is propelled through them, typically as felt in the wrists or neck.

9.Cools the surface of the leaves. Helps in growth and development. It controls the temperature of the plants. Allows the movement of minerals from the soil to different parts of the plant.

10.The aorta is the largest artery in the body. It carries oxygen-filled blood from the heart to different organs in the body.

Answer 2

1. MONOCYTES

2. AORTIC VALVE

3. 72

4.TRUE

7.Imbibition is a special type of diffusion that takes place when water is absorbed by solids-colloids causing an increase in volume.

8.The rhythmic dilation of an artery that results from beating of the heart

9.Transpiration plays a significant role by removing excess water from the aerial parts of the plants. The Significance of Transpiration in plants includes:

Keeps the cell turgid.

Cools the surface of the leaves.

Helps in growth and development.

It controls the temperature of the plants.

Allows the movement of minerals from the soil to different parts of the plant.

10.The aorta is the largest blood vessel in the body. This artery is responsible for transporting oxygen rich blood from your heart to the rest of your body. The aorta begins at the left ventricle of the heart, extending upward into the chest to form an arch.

11.Blood Is Fluid Connective Tissue. ...

Blood Provides the Body's Cells with Oxygen and Removes Carbon Dioxide. ...

Blood Transports Nutrients and Hormones. ...

Blood Regulates Body Temperature. ...

Platelets Clot Blood at Sites of Injury. ...

Blood Brings Waste Products to the Kidneys and Liver.

13.(I ) The mechanism of translocation of sugars from source to sink is through pressure flow hypothesis .

(ii ) Glucose prepared at source ( by photosynthesis ) is converted to sucrose .

(iii ) Sucrose moves into the companion cells , then into the living phloem sieve tube cells by active transport .

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