Spell

:3

Time

: 1 Hour

MAHA SAMKALPAM-2017 :: CHITTOOR DIST

Class : X

BIOLOGICAL SCIENCE

Marks : 25

I. Answer the following questions 1. 2. 3. 4.

4x1=4M

The wall of left ventricle is thicker than the wall of the right ventricle? Give reasons? In which animals flame cells are the excretory organs? What is meant by double circuit circulations? Expand 3 “R”s?

II. Answer the following questions in 3 – 4 sentences.

5x2=10M

5 6 7. 8.

What is the use of platelets? Why more urine is produced in winter? Write the differences between right ventricle and left ventricle? Imagine what happens if waste materials are not sent out of the body from time to time? 9. What is cardiac cycle? Which apparatus is used to measure the blood pressure? III. Answer the following questions in 5 – 8 sentences

2x4=8M

10. A) What is root pressure? How it is useful to the plant? Or B) Imagine what will happen if there is no lymphatic system in our body? 11

IV

A) Deepak said that Nephron is structural and functional unit of kidney? How will you support him? Or B) Write about secondary metabolites? Where do they come from and write about their uses?

Choose the correct answer A, B, C, D. Write in the brackets

6x1/2=3M

12. Blood on which side of the human heart is low in oxygen A) Left Ventricle

B) Right Ventricle

C) Left Atrium

( D) Right Atrium

13. Xylem and phloem are examples of A) Dermal tissue

B) Simple tissue

(

B) Diastolic pressure

C) Both A, B

B) House fly

C) Flat worm

B) Creatine

(

)

(

)

(

)

B) Solids become liquids D) Spintler relaxation

17. Urine has amber colour due to pressure of A) Urochrome

)

D) Hen

16. After having lunch or dinner one can feel to pass urine because of A) Stomach pressure on bladder C) Water content in food material

( D) None

15. Malphigian tubes are excretory organs in A) Earthworm

)

C) Complex tissue D) Transpiration

14. Normal B P is 120/80, in which 120 denotes A) Systolic pressure

)

C) Creatinine

D) Iodine