Life Processes - 2 Class 10 Worksheet Science Chapter 5

Assertion Reason Type Questions
Q1: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Kidneys perform a dual function in our body.
Reason: Selective reabsorption occurs in the glomerulus.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q2: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Tracheal cartilage is present in the throat.
Reason: The larynx plays an important role in human speech.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q3: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Veins have valves.
Reason: The pressure for the flow is far lesser compared to arteries.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q4: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: The opening and closing of the pore is a function of the guard cells.
Reason: Stomatal pores are the site for exchange of gases by diffusion.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q5: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Respiration is opposite of Photosynthesis.
Reason: In Photosynthesis food is made from energy and in Respiration food is converted to energy.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q6: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: Kidneys purify blood.
Reason: Renal vein has more Oxygen than renal artery.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

Q7: Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
Assertion: In plants gaseous exchange takes place by the opening and closing of guard cells.
Reason: The exchange of gases occurs across the surface of stem, roots and leaves.
(a) Both assertion and reason are true, and reason is the correct explanation of assertion.
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false and reason is true.

CCT Questions
Our body needs to remove the wastes that build up from cell activities and from digestion. If these wastes are not removed, then our cells can stop working and we can get very sick. The organs of excretory system consist of a pair of kidneys, a pair of ureters, a urinary bladder and a urethr(a) Each kidney is made up of nearly one million complex tubular structures called nephrons. The formation of urine involves various processes that take place in the different parts of the nephrons. Each nephron consists of a cup- shaped upper end called Bowman’s capsule containing a bunch of capillaries called glomerulus. Bowman’s capsule leads to tubular structure, proximal convoluted tubule, loop of Henle and distal convoluted tubule which ultimately join the collecting tubule.
Q1: The following substances are the excretory products in animals. Choose the least toxic form.
(a) Urea
(b) Uric acid
(c) Ammonia
(d) All of these

Q2: Glomerular filtrate is first collected by
(a) Distal convoluted tubule
(b) proximal convoluted tubule
(c) Bowman’s capsule space
(d) loop of Henle

Q3: The outline of principal events of urination is given below in random order.
I) stretch receptors on the wall of urinary bladder send signals to the CNS.
II) The bladder fills with urine and become distended.
III) Micturition (voiding out urine)
IV) CNS passes on motor messages to initiate the contraction of smooth muscles of bladder and simultaneous relaxation of urethral sphincter.
The correct sequence of the events is
(a) I → II → III→ IV
(b) IV → III → II→ I
(c) II → I→ IV → III
(d) III → II→ I→ IV

Q4: Urine formation occurs through
(a) Ultrafiltration, reabsorption, secretion.
(b) Secretion, osmosis, ultrafiltration and reabsorption.
(c) Only filtration and absorption.
(d) Only osmosis and secretion.

Very Short Answer Questions

Q1: Name the respiratory pigments of human beings.

Q2: In which form is food stored in plants and in animals?

Q3: Why are heterotrophs called consumers?

Q4: Name the watery substance released in our mouth during eating.

Q5: What does saliva contain?

Q6: Name the structure which prevents food from entering the passage to the lungs.

Q7: Why and how does water enter continuously into the root xylem of plants?

 Q8: What is the role of following in human digestive system –
(a) mucous
(b) Bicarbonate
(c) Trypsin

Q9: (a)What is translocation? Why is it essential for plants?
(b)Where do the substances in plants reach as a result of translocation?

 Q10: What are outside raw materials used for by an organism?

Q11: What processes would you consider essential for maintaining life?

Q12: Where do plants get each of the raw materials required for photosynthesis?

 Q13: In artificial kidney, which substance passes from the blood to the dialysis fluid?
(a) Urea
(b) Heart
(c) Uric acid
(d) Creatinine

Q14: What is the role of the acids in our stomach?

Q15: How is small intestine deigned to absorb digested

Q16: What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?

Q17: The breakdown of pyruvate to give carbon dioxide,water and energy takes place in
(a) cytoplasm
(b) mitochondria
(c) chloroplast
(d) nucleus

Q18: What are different ways in which glucose is oxidized to provide energy in various organisms?

 Q19: How is oxygen and carbon dioxide transported in human beings?

Q20: (i) Draw a diagram of an excretory unit of a human kidney and label the following:
Bowman’s capsule, Glomerulus, Collecting duct, renal artery
(ii)Write the important function of the structural and functional unit of kidney.
(iii)Write any one function of an artificial kidney.

Q21: What are the components of the transport system in human beings? What are the functions of these components?

Q22: Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?

Q23: The doctor measured Ravi’s blood pressure and said it is normal now. The range of Ravi’s blood pressure (systolic/diastolic) is likely to be-
(a)120/80mm of Hg
(b)160/80mm of Hg
(c)120/60mm of Hg
(d)180/80mm of Hg

Q24: What are the components of transport system in highly organized plants?

 Q25: How are water and minerals transported in plants?

Q26: The function of the lymph fluid is to
(a) Drains excess fluid from extracellular space back into the blood
(b) Carries digested and absorbed fat from intestine
(c) Circulates around the body and help in clotting of blood
(d) Both (a) and (b)

 Q27: How is food transported in plants?

 Q28: In birds and mammals the left and right side of the heart is separate(d) Give reasons.

 Q29: What are the methods used by plants to get rid of excretory products?

 Q30: List two types of the transport system in human being and write the functions of any one of these.

The solutions of the worksheet "Worksheet Solutions: Life Processes- 2"