1.The odometer reading of a moving car at 8:00 a.m. is 36540km and at 10:00 a.m. 36666km. If the car is moving on a zigzag path with variable speeds, its average speed in meters per second is-
A.35
B.6.3
C.12.6
D.17.5
2.Study the following statement about excretory system in human-
1.Wastes dissolved in water are filtered out as urine in the kidneys
2.Urine stored in urinary bladder is passed out through the urinary opening at the end of the urethra
3.Ureter carries urine to the urinary bladder
4.Useful substances are absorbed back in the blood
5.Blood containing useful and harmful substances reaches the kidney for filteration
The correct order of the processes given in the above statement is-
A.5,4,1,2,3
B.4,5,1,3,2
C.5,4,1,3,2
D.2,4,5,1,3
3.Study the following statements-
1.Prokaryotes do not have nucleus
2.A single cell can perform all the functions in a unicellular organism
3.Blue green algae are the examples of prokaryotes
4.Eukaryotes do not have well organized nucleus with a nuclear membrane
The correct statement are-
A.2,3, 4
B.1,2,3
C.1,2,4
D.1,3,4
4.Study the following statements-
1.Germination of seeds does not take place under dry condition
2.Nutrients get transported to each part of the plant in dissolve form
3.The supply of water to crops at different intervals improves the texture of soil.
4.The supply of water to crops makes the soil porous due to which exchange of gases become easy
5.Water protects the crop from the both frost and hot air currents
The statement which justify the needs to irrigate crops are-
A.1,2,5
B.1,2,3
C.2,3,4
D.3,4,5
5.Study the following statements-
1.Chromosome are located in the nucleolus
2.Genes are located in the chromosomes
3.Unicellular organism respire and reproduce
4.The most important function of cell membrane is to control the entry and exit of materials from the cells
The correct statement are-
A.1,2,4
B.1,2,3
C.2,3,4
D.1,3,4
6.Which one of the following shows the correct sequence of the path of urine in the human excretory system?
A.Kidney-Urinary bladder-Ureter-Urethra
B.Kidney-Ureter-Urinary bladder-Urethra
C.Kidney-Urinary bladder-Urethra-Ureter
D.Kidney-Urethra-Urinary bladder-Ureter
7.Sometimes after doing physical work we get muscles cramps .This results due to-
A.Non conversion of glucose to pyruvate
B.Conversion of pyruvate to alcohol
C.Non conversion of glucose to lactic acid
D.Conversion of pyruvate to lactic acid
8.Polio is caused by-
A.Protozoa
B.Fungi
C.Virus
D.Bacteria
9.Which one of the following can be used to form a virtual and magnified image of an object?
A.Both convex mirror and convex lens
B.Convex lens
C.Both concave mirror and concave lens
D.Concave lens
10.Which one of the following elements must be available in sufficient quantity in the water of a pond in at tadpoles are growing?
A.Oxygen
B.Iodine
C.Nitrogen
D.Chlorine
