Read the passage carefully and answer the following questions.
A dancer is demonstrating dance steps along a straight line. The position-time graph of the dancer is given here.
The average velocity of the dancer during time interval between t = 2 s to t = 9 s is
A 1 m s-1
B - 0.57 m s-1
C 2.75 m s-1
D - 0.29 m s-1
The pictures given below show various plant products. Which of the following options shows the correct match of the plant parts?
cabbage is not a root
Refer to the given figure and select the correct statement regarding P, Q, R and S.
AQ is the layer in which we live whereas P is the layer of molten iron and magnesium.
BR is iron rich inner core whereas S is nickel-iron rich outer core.
CR is in liquid state whereas S is in solid state.
DP is made up of gases whereas R is made up of rocks.
c is the answer
Natasha put a plant cell and an animal cell of similar size in two similar dishes containing the same amount of water overnight. The next day, she observed the cells under the microscope and noticed that the animal cell has burst and the plant cell looked more bloated. She drew the following conclusions:
(i) The animal cell has only a thin layer of cell membrane. When too much water enters it, it bursts.
(ii) Plant cell has cell wall made up of cellulose which is very strong material and prevents the cell from bursting.
(iii) The plant cell contains vacuole and therefore can absorb more water.
(iv) The animal cell does not possess vacuole.
Which of the above given conclusions are correct?
A(i) and (ii)
B(iii) and (iv)
C(i), (ii) and (iii)
DAll of these