Samcheer Kalvi 10th Science Unit 14 – Transportation In Plants And Circulation In Animals Book Back Answers:

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TN 10th Std Science Book Portion consists of  23 Units. Tamilnadu Class 10th Std Science consists of Physics Units 1 to 6, Chemistry Units 7 to 11, Biology Units 12 to 22, and Unit 23 – Visual Communication. Check Unit wise and Full Samacheer Kalvi 10th Science Book Back Questions and Answers/Answer Key Guide PDF format for Free Download.

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10th Science Unit 14 – Book Back 
Transportation In Plants And Circulation In Animals

I. Choose the best answer:

1. Active transport involves
a) Movement of molecules from lower to higher concentration
b) Expenditure of energy
c) It is an uphill task
d) All of the above

Ans : d) All of the above

2. Water that is absorbed by roots is transported to aerial parts of the plant
through
a) Cortex b) Epidermis c) Phloem d) Xylem

Ans : d) Xylem

3. During transpiration there is a loss of

a) Carbon dioxide b) Oxygen c) Water d) None of the above
Ans: c) Water

4. Root hairs are
a) Cortical cell   b) Projection of epidermal cell
c) Unicellular    d) Both b and c
Ans : d) Both b and c

5. Which of the following process requires energy?
a) Active transport   b) Diffusion   c) Osmosis    d) All of them
Ans: a) Active transport

6. The wall of the human heart is made up of
a) Endocardium   b) Epicardium    c) Myocardium   d) All of the above
Ans : d) All of the above

7. Which is the sequence of correct blood flow
a) Ventricle – atrium – vein – arteries     b) Atrium – ventricle – veins – arteries
c) Atrium – ventricle – arteries – veins   d) Ventricles – vein – atrium – arteries
Ans: c) Atrium – Ventricle – Arteries – Vein

8. A patient with blood group O was injured in an accident and has blood loss. Which blood group the doctor should effectively use for transfusion in this condition?
a) O group   b) AB group   c) A or B group   d) All blood group
Ans : a) O group

9. ‘Heart of heart’ is called
a) SA node   b) AV node   c) Purkinje fibers   d) Bundle of His
Ans : a) SA node

10. Which one of the following regarding blood composition is correct
a) Plasma – Blood + Lymphocytes b) Serum – Blood + Fibrinogen
c) Lymph – Plasma + RBC + WBC d) Blood – Plasma + RBC + WBC + Platelets
Ans : d) Blood – Plasma + RBC + WBC + Platelets

II. Fill in the blanks

1. involves evaporative loss of water from aerial parts.   Ans : Transpiration

2. Water enters the root cell through a  plasma membranes. Ans : Semi-permeable

3. Structures in roots that help to absorb water are   Ans: Root hairs

4. Normal blood pressure is. Ans : 120 mm / 80 mm Hg

5. The normal human heartbeat rate is about time per minute. Ans : 72 – 75

III. True or False (Correct the Statement if it is false):

Question 1.

Answer:

1. (b) Plasmodesmata
2. (a) Leaf
3. (d) Pressure gradient
4. (b) Pressure in xylem.

Question 2.

Answer:

1. (d) Blood Cancer
2. (a) Thrombocytes
3. (b) Phagocyte
4. (c) Decrease in leucocytes
5. (h) Absence of antibody
6. (g) Absence of antigen
7. (e) Allergic condition
8. (f) Inflammation.

III. True or False (Correct the Statement if it is false)

1. The phloem is responsible for the translocation of food. Ans : True.

2. Plants lose water by the process of transpiration. Ans : True.

3. The form of sugar transported through the phloem is glucose. Ans : False.
Corrected statement: The form of sugar transported through the phloem is Sucrose.

4. In apoplastic movement the water travels through the cell’s membrane and enters the cell. Ans : False.
Corrected statement: In symplastic movement, the water travels through the cell membrane and enters the cell.

5. When guard cells lose water the stoma opens. Ans : False.
Corrected statement: When the guard cells lose water the stoma closes.

6. Initiation and stimulation of heartbeat take place by nerves. Ans : False.
Corrected statement: Initiation and stimulation of heart beat take place by Sinoatrial (SA) node.

7. All veins carry deoxygenated blood. Ans : False.
Corrected statement: All veins, except the pulmonary vein, carry deoxygenated blood.

8. WBC defends the body from bacterial and viral infection. Ans : True.

9. The closure of mitral and tricuspid valves at the start of the ventricular systole produces the first sound ‘ LUBB’.
Ans : True.

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