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WorksheetsSCIENCE QUIZ(18/4/23)
Total questions: 40
Worksheet time: 22mins
New plants may be grown from a group of cells that are taken from other
plants. The given diagram shows the parts of a plant ‘X’. Explants obtained from which of the labelled structure will grow into new plants that are genetically identical to plant ‘X’.
P
Q
R
S
A student decides to study the impact of removing certain floral parts on fruit formation in
plant species X. He chooses three separate plants that are growing in the same plot A under
uniform conditions. In an adjacent plot B were plants from which no part of the flower was
removed. The data is given as below:
Plant No. Part removed/Plot A Impact on fruit formation
1. Anther 30% less fruit formation
2. Stigma No fruit formation
3. Petal No significant impact on fruit formation
Which of the following can be inferred from the given data?
a) Anther and stigma are crucial for sexual reproduction in each flower of species X.
b) Pollen grains are probably unable to germinate if they land on other parts of carpel beside
the stigma.
c) Species X is likely to be completely self pollinated.
d) Species X relies on both self and cross pollination.
Unicellular algae A and B of the same species were taken in separate glass plates and
chloroplasts were removed from the cells of A. After some time, they both were kept in bright sunlight for few hours and then Iodine test was performed on them .What will be the result?
Both A and B will turn blue black.
A will turn blue black.
B will turn blue black.
Both A and B will remain as they originally were.
The image shows the distribution of type of sex
chromosome in males and females. Based on the
image, when will a male child be born?
When an egg with X chromosome will fuse with
a sperm with X chromosome.
When an egg with X chromosome will fuse with a sperm with Y chromosome.
When an egg with Y chromosome will fuse with a sperm with X chromosome.
When an egg with Y chromosome will fuse with a sperm with Y chromosome.
A Planaria worm is cut transversely into two halves P and Q such that the part P contains the
whole head of the worm. Another Planaria worm is cut vertically in such a way that both the
cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms
could regenerate to form the complete worm/worms?
Only P
Only R and S
Only P, R and S
All P, Q, R and S
Birds can sustain high levels of activity much longer than mammals even at high altitudes. Which of the following features found in birds helps in this?
More efficient expansion and contraction of air sacs as compared to mammals.
Size of lungs larger than that of a mammal of comparable size.
Air sacs allowing unidirectional air flow with minimum dead space.
Circulatory system with more number of erythrocytes per unit volume of blood as
compared to mammals.
Transpiration has been described as a ‘necessary evil’ because it is inevitable, but potentially
harmful. Which of the following are the after-effects of transpiration?
(i) Absorption of mineral salts.
(ii) Regulation of plant temperature.
(iii) Energy deficit and injury in plants.
(iv) Ascent of sap.
(i) & (iv)
(i) & (iii)
(i), (ii) & (iii)
(i), (ii) & (iv)
The number and ploidy of nuclei present in a zygote is/are
one haploid
one diploid
two diploid
four haploid
The correct sequence of organs in the male reproductive system for the transport of sperm is:
testis → vas deferens → urethra
testis → ureter → urethra
testis → urethra → ureter
testis → vas deferens → ureter
A simplified food chain for an aquatic environment is shown below:
algae → mosquito larvae → small fish → large fish
If the number of mosquito larvae suddenly increased, the food chain would be affected. Analyze
the following consequences and select from the choices what would be the impact?
I. The number of small fish would increase.
II. The number of large fish would decrease.
III. The number of large fish would increase.
IV. Amount of algae would decrease.
Only I
Only IV
Both I and IV
Both II and IV
Hawks and eagles are often reported to die due to pesticide poisoning, but pigeons are not.
The phenomenon responsible for this is:
Eutrophication
Pollution
Biomagnification
Accumulation
A fish was placed in Fish bowl I with
water plants. Another fish was placed
in Fish bowl II with no water plants.
Which of the following data indicates
the correct value for the number of
times the fish opens its mouth and
the amount of dissolved oxygen in
each fish bowl?
a)
b)
c)
d)
Four gas jars A, B, C & D contain four grams each of different gases, Cl2, SO2, O2 and CO2 respectively. Which gas jar contains minimum number of the gas molecules?
Jar A
Jar B
Jar C
Jar D
Chlorine gas reacts with _______ to form bleaching powder.
dry slaked lime
dil. solution of Ca(OH)2
conc. solution of Ca(OH)2
dry calcium oxide
Baking powder is different from baking soda as it also contains a small quantity of edible acid.
The presence of the edible acid decreases bitterness of baking soda. Which acid is present in
baking powder?
sulphuric acid
acetic acid
tartaric acid
malic acid
Which of the following is/are correct about the elements whose atoms are as given;
The mass no. of all the elements are the same
B & C are isotopes
A & D are isobars
All the atoms have different number of shells
The valency of the atoms of the elements A and B are 2 and 3 respectively. The molecular
formula of the compound formed from these element is:
AB
A2B3
A3B2
A2B2
Iron filings are added in four test tubes containing aqueous solutions of ZnSO4, CuSO4, FeSO4 and Al2(SO4)3.
In which of the test tubes will reaction occur.
A
B
C
D
In the manufacture of sodium hydride by chlor-alkali process, two gases A & B are formed as
by-products. The gas A is liberated at the anode and gas B, near the cathode. The gas B is:
Chlorine
Oxygen
Nitrogen
Hydrogen
Potassium iodide and lead nitrate solutions are mixed in a test tube to form lead iodide and
potassium nitrate. Which of the following correctly represents/represent the type/types of the reaction (s) involved?
i) Displacement reaction
ii) Precipitation reaction
iii) Combination reaction
iv)Double displacement reaction
iv only
ii only
both i and ii
both ii and iv
The mass by mass percentage of 200 grams of a solution containing 4.0 grams of sodium
cloride as solute is
2.0
2.1
1.9
4.0
The image is that of a suspended wheel known as Maxwell Wheel.
This axis-mounted wheel suspended at both ends continuously
winds and unwinds up and down a string. Two students Nimrat and
Ashish observe this toy and made some observations
Nimrat: The toy works on the principle of conservation of energy
(sum of kinetic and potential energies) and eventually the toy will
stop due to friction and consequently loss of energy.
Ashish: The toy is working on the concept of gravitation and since
gravitation is a force acted upon by the earth, the toy will keep on
moving.
Which of the following options is/are correct?
Both Nimrat and Ashish are correct.
Only Nimrat is correct.
Only Ashish is correct.
Both Nimrat and Ashish are wrong.
If in a circuit the currents coming to a point and going out
from that point are as shown in the image, then choose the
correct equation from the following.
i1=i2=i3=i4=i5
i1+i4+i3=i5+i2
i1-i5=i2-i3-i4
i1+i5=i2+i3+i4
Assertion (A): The graph of P vs (1/V) for an ideal gas at constant temperature is a downward
straight line.
Reason (R): At constant temperature, P ∝ 1/V for an ideal gas.
Choose the current option:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true.
A roller coaster begins at rest from point A, 120 m above the ground, as shown in figure.
Assume that no energy is lost from the coaster to frictional heating, air resistance, sound, or any other process. The radius of the loop is 40 m.
(take g=10 m/s2)
The speed of the roller coaster at points B and D are respectively
34 m/s, 28 m/s
28 m/s, 34 m/s
17 m/s, 14 m/s
17 m/s, 0
Mohan is bouncing up and down at the end of a diving board, as shown here.
The y (vertical displacement of the board) vs t (time) graph is shown below.
Choose from the following the correct pair of information for Mohan and the springboard.
Maximum displacement between lowest and highest points of oscillation
5.0 m 0.75 s
4.5 m 1.50 s
4.5 m 1.25 s
5.0 m 1.50 s
Annu Rani is a premier Javelin Thrower from India, who participated in the World Athletics
Championship, 2019. A schematic diagram of a throw is also shown.
Choose from the following, the main factors for a long successful throw:
Power in the arms, Run-up to gain momentum, Angle of the throw.
Strength in legs and Angle of throw.
Power in arms and Angle of throw.
Nice outfit, Angle of throw and shouting while throwing.
Figure here shows speed-time graph for a car moving in a straight line. At which point is its
acceleration non-uniform?
A
B
C
D
The angle of incidence on mirror B is
20 degree
50 degree
60 degree
70 degree
These are four aluminum rods of different dimensions. Which will have the least resistance?
A
B
C
D
In recent years, the rate of species becoming extinct has increased due to
natural catastrophes.
human development activities.
competition between species.
natural evolutionary processes.
When describing an ecofriendly house, what is meant by the terms 'zero net energy'?
The amount of energy produced in the house with renewal sources is equal to more
than the amount of energy used by the house.
The house does not use any energy.
The amount of energy used by the house is more than it produces through renewable
energy.
The house produces all its own energy needs.
El Nino responsible for temperature anomalies and poor monsoon impacting Asia, arises in:
Indian Ocean
Antarctic Ocean
Pacific Ocean
Atlantic Ocean
What does it mean when a country talks about being carbon neutral?
It will stop the production of all the items that are increasing its carbon footprint.
It will eliminate carbon emissions by switching entirely to renewable sources.
It will balance out its carbon emissions by reducing or offsetting them.
It will balance out its carbon emissions by reducing or offsetting them.
Which of the following options correctly represents the consequences of destruction of
forests?
i. Soil erosion.
ii. Disturbance in water cycle.
iii. Limited availability of forest produce.
iv. Increase in crop diseases.
i, ii & iv
ii, iii & iv
i, iii & iv
i, ii & iii
Which of the following is a serious threat we are witnessing as a consequence of climate
change?
Decrease in food productivity
Decreased in life span of humans
Less rainfall
Rising sea levels
Which of the following is not and example of human made ecosystem?
Aquaculture
Plantation
Agriculture
Forests
Which amongst the following is most energy efficient?
Incandescent bulb
Fluorescent tube light
Compact fluorescent lamp
Light emitting diode
Depletion of ozone layer is harmful as it can cause on earth an increased concentration of
ultraviolet radiation
infrared radiation
X-rays
gamma rays
Which of the following ecosystem experiences dramatic fluctuation in the water level in
different seasons?
Deep oceans
Brackish water
Wetlands
Coral reefs
