DISTRICT COMMON EXAMINATION BOARD – KADAPA – YSR Dist.

Action Plan Model Question Paper 2019-2020 BIOLOGICAL SCIENCE

(English Medium) Class: 10 Max. Marks: 50 Time: 2.45Hrs Instructions:

1. This Question paper contains only ONE Part. 2. 15 minutes are allotted for reading the question paper in addition to 2.30 hours for writing the answers 3. There are four sections and 33 questions in the paper

4. All Answers should be written in the separate answer booklet. 5. There is internal choice in Section – IV only. 6. Write all the questions visible & legibly.

SECTION – I Note: 1. Answer all questions.

2. Each question carries ½ Mark. 12X½=6 1. The figure shows a food web, where A,B,C,D,E,F are different species ( A – Plants, B – Rabbit, C – Goat, D –Fox, E – Lion, F – Tiger). The direction of the arrows symbolizes the direction of flow of Nutrients. An increase in the population of which species is likely to decrease the population of Species F

2. Read the sentence find the Error and Rewrite it.

The amount of oxygen utilized by Micro Organisms for decomposition is called as chemical oxygen demand.

3. Observe the flow chart and answer the blank.

4. Theory of Evolution: Jean Baptist LamarcK : : Natural selection : 5. Observe the diagram and Identify the Part X. 6. Which group of organisms together constitute a food chain.

7. Expand TMC.

22-01-2020

Day- 32

20E

X

Phytoplankton

Zooplankton

Fish

Man

Phytoplankton

Rat

Rabbit

Dog

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8. I am a particular segment of a DNA molecule, Which determines the inheritance and expression of a

particular character. Mendel called me as factor. Who am I?

9. Phenotypic Ratio 3 : 1 proves the Mendel’s Law of _________

10. Identify the mismatched one. World Environment day – 5th June World Water day – 22nd March World Ozone day – 15th October

11. The following placards are prepared by students in a School. What do they want to tell us.

12. Bat is an example for Nocturnal animal. Write an example for Diurnal animal.

SECTION – II

Note: 1. Answer all questions. 2. Each question carries 1 Mark. 8X1=8 13. What will happen if there are no villi in our intestine?

14. The percentage of some Resources in India are given in pie chart given below. 15.

16. Identify the Part –A. Name the movement shown by the part of Human Digestive System.

17. Write the aim of the activity done in your school by using the PH paper.

18. Name the person who deal with fossil evidences.

19. Rohith told that Archaeopteryx is a connecting link between Aves and Reptiles How do you support him?

20.

Write the percentage of coal consumption in India?

Identify the Logo and write the significance of this Logo.

What is the Biomass of Tertiary consumer

in the given pyramid?

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SECTION – III

Note: 1. Answer all questions. 8X2=16 2. Each question carries 2 Marks. 21. Fill the following Table. If P −Purple dominant flower 𝑝 − White Recessive flower Write colour of the flower. 22. Rohini said that “ Break down of food can be shown by using the model of chalk piece kept in vinegar”. Write procedure for the Activity in your school.

23. Fill the table.

Organ Action done

Teeth

Retropulsion

24. Read the following passage and answer the Questions. Farmer based soil and water conservation measures implemented in individual fields were Broad bed furrow land form and contour planting. Planting Gliricidia on field bunds to strengthen them and make the soil Nitrogen – rich Micro irrigation techniques like Drip irrigation can reduce water consumption. a) Which plant make the soil Nitrogen Rich? b) Name two micro Irrigation techniques?

25. If you have a chance to meet an Ecologist What type of Questions will you ask him about pollution of Kolleru lake? 26. Identify the Logo

Padma is a student of Class 9. She prepared cloth bag by using old clothes of her mother. Which R is used by her in 3R’s.

27. Mention 4 Biological pest control methods which are Eco friendly to Nature.

28. a) Identify the structure?

b) Name the 4 bases present in the structure?

SECTION – IV Note: 1. Answer all questions.

2. Answer any one from internal choice of each question.

3. Each question carries 4 Marks. 5X4=20

29. Write note on a) Homologous organs b) Analogous organs.

(Or)

Write note on a) Pyramid of Number b) Pyramid of Energy

30. Give Reasons.

a) We can’t identify taste when food is very hot.

b) If Glucose level falls in blood we feel hungry.

c) Small intestine is similar to a coiled pipe.

d) If we press tongue against the palate we can recognise taste easily

(Or)

Write differences between Renewable and non Renewable resources.

31. What experiment should you perform to understand Action of Saliva on flour? Explain its procedure and

Apparatus that you followed.

(Or)

32. Read the following table and answer the following Questions.

a) In which year lake water spread area is less?

b) What are the reasons for decrease in lake area?

c) Write the location of Kolleru Lake?

d) How much area of Kolleru lake was occupied by farmers to convert it into Rice fields in 2004?

(Or)

Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam): People of more than 20 villages in two mandals of Srikakulamhave raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated.

i) Do you think the villagers are doing a right thing to agitate? Why? ii) What resources are the villagers trying to save by their agitation? iii) Will the villagers be benefitted by the rich minerals extracted from sand? iv) Why does the private company want to carry out mining in the area?

33. Draw a schematic diagram of villus in small intestine. Identify the parts.

(Or)

Complete the checker board showing Mendel’s Law’s of independent assortment.

Write the colour of the seeds.

Prepared by Smt.B.Siva Lakshmi , SA-Bio Science, ZPHS (B) Galiveedu

Observe the embryological evidences and answer the

following questions.

a) What does it indicate?

b) Name the larva of frog which resembles fish?

c) Does it indicate that life history of every individual

exhibits the structural features of their Ancestors?

d) Who is the common ancestor of Human beings?