international indian school, riyadh worksheet (2020 … · 2020-05-21 · of (i) alveolar air,(ii)...

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INTERNATIONAL INDIAN SCHOOL, RIYADH

WORKSHEET (2020-2021)

GRADE - XI – BIOLOGY - SECOND TERM

Chapter 1: The living World

1. Expand ICBN, ICZN.

2. Write the scientific names of the following:

A. Mango

B. Tiger

C. Housefly

D. Wheat

E. Potato

F. Leopard

3. Define the term species.

4. Fill in the blanks(a) and (b)

Species (a) Family order (b) Phylum

5. Identify the correct sequence of the taxonomical Categories:

(a) Order species phylum kingdom.

(b) Genus species order kingdom

(c) Species Genus Order Phylum

6. What is Biological classification? What is the need of classification?

7. What are the major divisions of classification, classify man.

8. What are taxonomic aids? Mention some of the taxonomic aids for

identification

9 Differentiate between classical taxonomy & Modern taxonomy.

10 State any five objectives of classification.

Chapter 2 : Biological classification

1. Name the substance present in the cell wall of diatoms. What make

them hard and indestructible?

2. Why are plasmodium like protozoans called sporozoans?

3. What is the basic difference between conidia and sporangiospores?

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4. Give the scientific names of the fungus that causes(a) Rust of wheat

(b) Smut of wheat.

5. What are bacteriophages?

6. Who discovered Viriods? Write the difference between viruses and

viriods?

7. How is zygospore different from sporangiospore in fungi?

8. Differentiate between Ascomycetes and basidiomycetes.

9. What do the terms phycobiont and mycobiont signify?

10. Why are deuteromycetes commonly known as imperfect fungi?

11. Write the genetic material in plant viruses and animal viruses

12. State an economically important use of

(i) Heterotrophic bacteria.

(ii) Archaebacteria.

13 Distinguish between bacteria & cyanobacteria?

14 What are the different groups of fungi?

15 Find out what do the terms “algal bloom”& “red tides” signify?

Chapter 3 : Plant kingdom

1. Name the first group of terrestrial plants that possess vascular

tissues.

2. Why are the members of rhodophyceae called red algae?

3. Why is the embryo sac of an angiosperm haploid and

endosperm triploid/

4. Write any four characteristic features of pteridophytes?

5. Both bryophytes and pteridophytes require water for

fertilization yet they differ from each other in many aspects

.Bring out any two differences

6. Both Gymnosperms and Angiosperms bear seeds. But, why

are they classified separately?

7. Differentiate between haplotonic and diplotonic lifecyles

8. Name the fertilization that is unique to angiosperms? Explain

it.

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9. Which is the dominant phase in the life cycle of of

gymnosperms and algae.

10. What is alternation of generations? Describe how bryophytes

show this phenomenon in their life cycle.

Chapter 11: Transport in plants

1. Define Translocation.

2. Define osmosis, Facilitated diffusion, passive

transport, diffusion, and active transport.

3. Define plasmolysis.

4. What happens to cell when kept in hypertonic,

hypotonic and isotonic solution?

5. Mention the factors on which diffusion depends?

6. Define imbibitions. Give examples?

7. Define mass flow, ascent of sap, and factors

responsible for it.

8. Differentiate between apoplast and symplast.

9. Define transpiration, guttation.

10. Difference between transpiration and guttation.

11. What is stomatal apparatus? What are factors affecting

the opening and closing of stomata?

12. Write the factors affecting transpiration and uses of

transpiration.

13. What are mycorhizae, casparian strips?

14. Refer figure 11.6 page 184 and answer the following:

A. Name the different cells.

B. What are casparian strips made of?

C. Name the pathways of water movement.

15. Refer figure 11.3 page 180 and answer the following:

A. Solution of which chamber has higher water

potential?

B. Solution of which chamber has lower water

potential?

C. In which direction will osmosis occur?

D. Which solution has the highest solute potential?

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E. At equilibrium which chamber will have lower

water potential?

F. If one chamber has psi of -2000kPa and other -

1000kPa. Which is the chamber which has higher

psi

Chap 12 - Mineral Nutrition

1. Why are majority of plant nutrients elements called

mineral nutrients?

2. Why are the elements C,H,N and O called structural

elements?

3. Nitrogen fixation is shown by prokaryotes not

eukaryotes. comment.

4. Represent schematically nitrogen cycle. Name the

organisms involved in it.

5. Explain the steps involved in root nodule formation.

6. Refer fig Hydrophonics in text book and answer.

a. Name the technique shown in the figure and who

demonstrated this technique for the first time?

b. Name atleast three plants for which this technique can

be applied for their commercial production.

c. What is the significance of the aerating tube and the

feeding funnel.

7 Write a note on biological nitrogen fixation?

8. Name the first stable product of nitrogen fixation. write

an equation for it?

Chapter 13: Photosynthesis

1. Name the scientist who first proposed that oxygen in

liberated in photosynthesis which comes from water

and not from carbon dioxide.

2. Name the organism used by T.W. Engelmann?

3. Chloroplasts show division of labor. Explain.

4. What are reaction centers?

5. What are photo systems?

6. Explain photolysis of water or Hills reaction.

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7. What is non-cyclic photophosphorylation? Explain (Z-

scheme)

8. What are antennae?

9. Explain C-3 pathway? Why is it called so?

10. In maize and sorghum there is a specific pathway

which occurs. Explain it and explain the anatomy of

leaf.

11. What is photorespiration? Why is called wasteful

process?

12. Why RuBisCO has higher affinity to carbon dioxide

than oxygen?

13. What is law of limiting factor? Who applied this to

photosynthesis? Explain the factors affecting the

photosynthesis.

14. Write the differences between C-3 and C-4 plants.

15. What can we conclude from the action and absorption

spectrum of photosynthesis of overlap? At which

wavelength they show peaks?

Chapter 14: Respiration in Plants

1. Define cellular respiration.

2. What are respiratory substrates? Name the common

respiratory substrates.

3. What are the two crucial events in aerobic respiration

and where does occur?

4. Name the site of pyruvate synthesis and also write the

chemical equation where pyruvic acid dehydrogenase

acts as a catalyst.

5. Differentiate between aerobic and anaerobic

respiration.

6. Represent schematically the pathway of formation of

lactic acid.

7. Define respiratory quotient and write RQ values of

fats, proteins, and carbohydrates.

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8. Represent schematically glycolytic pathway of EMP

pathway.

9. Represent schematically Kreb’s cycle.

10. What is oxidative phosphorylation and explain

chemiosmotic hypothesis of ATP synthesis.

11. Give diagrammatic representation of ETS.

12. Calculate the number of ATP synthesized during

glycolysis.

13. Calculate the number of ATPs produced from one

molecule of pyruvic acid on its aerobic oxidation.

14. Calculate the number of ATPs on complete oxidation

of one molecule of glucose.

Chapter 15: Plant Growth and Development

1. Define growth.

2. Define development.

3. Define plasticity in plants.

4. What is heterophylly? Give example

5. Differentiate between arithmetic and geometric growth

rates.

6. Differentiate between absolute growth rate and relative

growth rate.

7. A primary root grows from 5 cm to 19 cm in a week.

Calculate the absolute growth rate and relative growth

rate over the period.

8. Refer figure 15.7 page 244. Which of them shows

higher relative growth rate? Justify.

9. Plant growth regulators (PGRs) have innumerable

practical applications. Name the PGR you should use

to:

A. Increase yield of sugarcane

B. Promote lateral shoot growth

C. Cause sprouting of potato tuber

D. Inhibit seed germination.

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10. “Both a short day plant and a long day plant can

produce flowers simultaneously in a given place.”

Explain.

11. A. Define seed dormancy.

B. Mention two causes for seed dormancy.

12. Which one of the plant growth regulators would you

use if you are asked to:

A. Induce rooting in a twig

B. Quickly ripen a fruit

C. Delay leaf senescence

D. Induce growth in axillary buds

E. ‘Bolt’ a rosette plant

F. Induce immediate stomatal closure in leaves?

Chap16: Digestion and absorption

1. What guards the opening of the stomach into duodenum?

2. Why are villi present in the ileum and not in the stomach?

3. Which is the largest gland in our body? Name the chemical secreted

by this gland.

4. What term is given to the form of food that enters the pharynx?

5. In humans, starch digestion starts in the buccal cavity, but stops in

the stomach. Why?

6. How would non secretion of saliva affect digestion of food in

mouth?

7. What would happen if HCL is not secreted in the stomach?

8. Bile juice has no digestive enzymes, yet it is important for digestion.

Give reason.

9. How would it affect the digestion of fats and carbohydrates, if there

is a blockade in pancreatic duct? Explain.

10. In which part of the alimentary canal major absorption of the

digested food takes place? What are the absorbed forms of different

kinds of food material?

11. Describe the process of digestion in different parts of alimentary

canal.

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12. What is peristalsis?

13. Draw a diagram of human digestive system and label the glands

associated with it.

14. Which part of the alimentary canal harbours symbiotic microbes.

15. Name the structure that regulates the opening of oesophagus into

the stomach.

Chap17: Breathing and Exchange of Gases

1. Why does exchange of respiratory gases continue to occur in lungs

even if you hold the breathe for 30 seconds?

2. Where are the receptors located in our body, that can sense

changes in CO2 and H+ concentrations?

3. What is vital capacity? What is its significance?

4. How is residual volume different from functional residual

capacity?

5. Describe the process of gaseous exchange between alveoli of lungs

and blood in respect of partial pressure of respiratory gases.

6. Describe the role of haemoglobin in the transport of respiratory

gases.

7. Differentiate between(i) IRV&ERV (ii) Vital capacity & total lung

capacity (iii) Inspiratory capacity & Expiratory capacity.

8. Give the values of each of the following:

(a) P02 of (i) alveolar air,(ii) oxygenated blood and (iii) a

metabolically active tissue.

(b)PCO2 of (i) alveolar air,(ii) deoxygenated blood and (iii)

oxygenated blood.

9. Write about disorders of respiratory system.

10. Explain the process of inspiration under normal conditions.

Chap18: Body fluids and circulation

1 Name the different types of granulocytes. Give the function of the

one which

constitutes maximum percentage of total leucocytes.

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2 What it is the name of the straw coloured fluid left after clotting of

blood? How is it

different from blood?

3 Differentiate between arteries and veins.

4 Explain double circulation with the help of diagram.

5 What is cardiac cycle? Explain

6 Explain when and how the two sounds of heart are produced?

7 How is heart failure different from heart attack?

8 What is ECG?what does P, QRS, T peaks indicate

9 Explain erythroblastosis foetalis

10 Human heart is myogenic.comment

Chap19: Excretory products and their elimination

1. Why is glomerular filtration also called as ultra filtration?

2. Urine becomes hypertonic as it flows through the descending limb

of henle’s loop. Justify

3. Expand ANF. How does it cause a decrease in blood pressure?

4. Where and how is urea formed in ureotelic animals?

5. Mention the differences between ureotelism and ammonotelism.

6. What are ammonotelic, ureotelic, uricotelic animals? Give two

examples each.

7. Differentiate between glycosuria and ketonuria.

8. Name the hormones involved in the regulation of kidney function.

9. What is the significance of JGA in kidney function?

10. What is reabsorption in urine formation? Name the two

modes of reabsorption.

11. Explain the mechanism of urine formation in a human being.

12. Give a brief account of the counter current mechanism.

13. Explain the auto regulatory mechanism of GFR.

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Chap20: Locomotion and Movement

1. Why are red muscles called aerobic muscles?

2. What is H zone in sarcomere?

3. Why is human skull called dicondylic?

4. Why are the ribs described as bicephalic?

5. What is the function of girdle bones?

6. What is the advantage of synovial fluid?

7. Differentiate between skeletal muscles and visceral muscles.

8. Why are skeletal muscles also called as (a) striated muscles (b)

voluntary muscles?

9. Give reason why white muscles fatigue soon?

10. Draw a neat labelled diagram of an actin filament of a myofibril.

11. Bring out the role of calcium ions and ATP in muscle contraction.

12. What are true ribs? How many true ribs are present in a human

skeleton?

13. What are joints? Why are they essential?

14. Differentiate between fibrous joints and cartilaginous joints with

an example of each.

15. How are synovial joints different from cartilaginous joints? Give

an example of each of them.

16. Name the different types of synovial joints and give example of

them.

17. Describe the mechanism of muscle contraction?

Chapter 21: Neural Control and Coordination

1. Why are neurons excitable?

2. Why is blind spot devoid of vision?

3. Explain the conduction of nerve impulse along a nerve fiber.

4. What is meant by reflex arc? Mention its components in proper

sequence and their functions in a reflex action.

5. Draw a diagram of human eye. Explain the mechanism of vision.

6. Draw a diagram of section of cochlea and explain the mechanism of

hearing.

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7. Explain the transmission of impulse between two neurons.

8. Differentiate between electrical and chemical synapse.

9. Explain the structure of brain.

10. Differentiate between rods and cones.

11.

Write A, B, C, and D.

12. Explain the structure of neuron with the help of diagram.

13. What are different types of neurons. Give examples.

14. Define synapse, synaptic cleft.

15. Which part of the central nervous system acts as the master clock?

16. Write about mechanism of hearing

17 Bief note on mechanism of vision

Chapter 21: Chemical Coordination and Integration

1 What are gonadotropics?

2 Why oxytocin is called as ‘birth hormone’?

3 What is corpus luteum? How does it function as a endocrine

gland?

4 Explain the hormones of kidney and GI tract.

Action potential reaches at axon terminal.

Vesicles release--(A) -- filled in vesicles.

Chemicals present in synaptic cleft bind to -- (B)--.

Binding opens the--(C)--.

New potential is generated in-- (D)--.

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5 In general, how steroid hormones do effects changes in their

target cells.

6 Describe the physiological functions & disorders of thyroid

gland.

7 A patient was complaining of frequent urination, excursive

thirst, hunger and

tiredness. His fasting glucose level was found higher than 130

mg / dL an two occasions :

(i) Name the disease

(ii) Give the root cause of this disease \

(iii) Explain why the blood glucose level is higher than 130 mg

/ dL.

8 Explain the Hormones of adrenal gland and their action on

target tissue in a tabular form.

9 Explain the mechanism of hormone action.

10 Name the gland that functions as a biological clock in our

body where it is located? Name its one secretion.

Prepared by:

XI-XII Boys Section.

international indian school, riyadh worksheet (2020 … · 2020-05-21 · of (i) alveolar air,(ii)...

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