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What is the advantage of having four cha...

What is the advantage of having four chambered heart?

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Human heart has four completely separated chambers which allow two completely separated circuits of oxygenated and deoxygenated blood i.e. double circulation.
a] It ensures complete separation of oxygenated and deoxygenated blood.
b] It allows rapid pumping of oxygenated blood under high pressure which is required by active endothermic animals to maintain the constant body temperature.
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ZEN PUBLICATION-LIFE PROCESSES-ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER [SA] TYPE 2 QUESTIONS)
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  2. Write one function of each of the following components of the transpor...

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  3. Explain how does the exchange of gases occur in plants across the surf...

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  4. How are water and minerals transported in plants ?

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  5. Mention the site of exchange of material between the blood and surroun...

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  6. Draw a schematic representation of transport and exchange of oxygen an...

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  7. Describe the process of digestion of protein in the stomach.

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  8. Describe an experiment to show the effect of concentration on the rate...

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  9. Define the term excretion. Why should animals excrete waste matter?

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  10. Name the main excretory organ of human beings and state the form in wh...

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  11. Name the following: a] The process in plants that links light energy...

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  12. How do the guard cells regulate opening and closing of stomatal pores?

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  13. Why does absorption of digested food occur mainly in the small intesti...

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  14. What is the advantage of having four chambered heart?

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  15. Name two waste products that are stored in old xylem in plants. Name t...

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  16. State reason for the following i] Rings of cartilage are present in ...

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  17. Draw a labeled diagram of cross section of a leaf.

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  19. Trace the movement of oxygeneted blood in the body.

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  20. Write the function of valves present in between atria and ventricles.

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