datavorous/entrance-exam-dataset huggingface dataset:
If a piece of plane glass is placed on a word with letters of different colours, then the colour of the letter which will appear to be least raised is

Options:
A red
B green
C yellow
D violet

The correct answer is:
red

Solution:
Refractive index Î¼=real depth apparent depth
Refractive index is maximum for violet colour and minimum for red colour. Hence, letter which appears minimum raised are red.

Topic: Physics, Ray Optics, NEET
If a planet was suddenly stopped in its orbit, suppose to be circular, find how much time will it take in falling onto the sun?

Options:
A 28times the period of the planet's revolution
B 42 times the period of the planet's revolution
C 32 times the period of the planet's revolution
D 9 times the period of the planet's revolution

The correct answer is:
28times the period of the planet's revolution

Solution:
Assuming the new path of the planet as an elongated ellipse of semi major axis r2 and using kepler's law we get

T12T22=r3r23

T2=T18

But this is the total time to orbit the sun. To fall down it takes half the total time. So the required time is

t=12T18=T128

Topic: Physics, Gravitation, NEET
If a plant with genotype AaBb is self-fertilized, the probability of getting AABB genotype will be (A and B are not linked)

Options:
A 1/2
B 1/4
C 1/3
D 1/16

The correct answer is:
1/16

Solution:
If a plant with genotype AaBb is self fertilized than only one progeny with genotype AABB is produced in the offsprings.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a population grows in a habitat with limited resources, then following phases of achievement observed

Options:
A Lag â Acceleration â Deceleration â Asymptote
B Log â Deceleration â Acceleration â Asymptote
C Log â Acceleration â Deceleration â Asymptote
D Lag â Acceleration â Asymptote â Deceleration

The correct answer is:
Lag â Acceleration â Deceleration â Asymptote

Solution:
The growth of the population depends upon the availability of resources. If the resources are unlimited, the population will exhibit exponential growth. However, if the resources are limited there is a competition between the individuals for resources. In a certain habitat, there are only enough resources that can accommodate only the maximum number possible, if the population increases beyond that there will be no growth. Stages of lag phase followed by acceleration-deceleration and lastly the phase of the asymptote are seen in the population who lives with limited resources.

Topic: Biology, Organisms and Populations, NEET
If a population of 50 Paramecium present in a pool increases to 150 after an hour, what would be the growth rate of the population?

Options:
A 5 per hour
B 50 per hour
C 200 per hour
D 100 per hour

The correct answer is:
100 per hour

Solution:
Population of paramecium at time t=50
Population of Paramecium at time(After one hour) =150
Growth rate of population =150-50=100 per hour
So the correct answer is D.

Topic: Biology, Organisms and Populations, NEET
If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the growth rate of the population?

Options:
A 50 per hour
B 200 per hour
C 5 per hour
D 100 per hour

The correct answer is:
100 per hour

Solution:
If a population of 50 Paramoecium present in a pool increases to 150 after an hour, the growth rate is 100 per hour.

Topic: Biology, Organisms and Populations, NEET
If a process is carried out at constant volume, how is the change in internal energy related to heat?

Options:
A ∆U = qV
B ∆U = qP
C ∆U = qT
D ∆U = w

The correct answer is:
∆U = qV

Solution:
When a process is carried out at constant volume, the change in internal energy (∆U) is related to heat supplied at constant volume as ∆U = qV.

Topic: Chemistry, Thermodynamics (C), NEET
If a proton and anti-proton come close to each other and annihilate, how much energy will be released?

Options:
A 1.5×10-10 J
B 3×10-10 J
C 4.5×10-10 J
D 2Ã10-10 J

The correct answer is:
3×10-10 J

Solution:
Mass of proton = mass of anti-proton
=1.67×10-27 kg=1 amu
Energy equivalent to amu = 931 MeV.
So, energy equivalent to 2 amu =2×931 MeV
=1862×106×1.6×10-19
=2.97×10-10J
≈3×10-10 J

Topic: Physics, Nuclear Physics, NEET
If a quantity of heat 1163.4 J is supplied to one mole of nitrogen gas, at room temperature at constant pressure, then the rise in temperature is (Given R=8.31 J mole-1 K-1)

Options:
A 54 K

B 28 K

C 65 K

D 40 K

The correct answer is:
40 K

Solution:
Since nitrogen is diatomic gas
C⁡ P⁡ = 7 2 R⁡
Heat supplied Q=nCpΔT
where n is the number of moles, CP is the molar specific hence at constant pressure, ΔT is the rise in temperature.
∴ 1 1 6 3 · 4 = 1 7 2 × 8 · 3 1 Δ T⁡
ΔT⁡=1163·4×27×8·31=40 K

Topic: Physics, Thermodynamics, NEET
If ar and at represent radial and tangential accelerations, the motion of a particle will be uniformly circular if

Options:
A ar=0,at=0
B ar≠0, at≠0
C arâ 0 , at=0
D ar=0, at≠0

The correct answer is:
arâ 0 , at=0

Solution:
For uniform circular motion, tangential acceleration is zero while the radial acceleration is non zero.
at=0, ar≠ 0

Topic: Physics, Laws of Motion, NEET
If a radioactive substance reduces to 1 1 6 of its original mass in 40 days, its half-life is

Options:
A 10 days
B 20 days
C 40 days
D None of these

The correct answer is:
10 days

Solution:
From the formula
N = N 0 1 2 n
N 1 6 = N 0 1 2 n
N 0 = original number of atom
1 2 4 = 1 2 n
â n = 4
4 half lives
â´ 4 T 1 / 2 = 4 0
4 T 1 / 2 = 4 0 4 = 1 0 days

Topic: Physics, Nuclear Physics, NEET
If a ray of light in a denser medium strikes a rarer medium at an angle of incidence i, the angles of reflection and refraction are respectively r and râ². If the reflected and refracted rays are at right angles to each other, the critical angle for the given pair of the medium is

Options:
A sin-1â¡tanâ¡r′
B sin-1â¡tanâ¡r
C tan-1â¡sinâ¡i
D cot-1â¡tanâ¡i

The correct answer is:
sin-1⁡tan⁡r

Solution:
We know that,
IÎ¼=sinâ¡isinâ¡i′
But r+r′=90oÂ Â r′=90o-r
âÂ sinâ¡r′=sinâ¡90o-r
sinâ¡r′=cosâ¡râsinâ¡r′=cosâ¡i
1Î¼=sinâ¡icosâ¡iâ1Î¼=tanâ¡iâsinâ¡iC=tanâ¡i=tanâ¡r
The critical angle for the pair of media
iC=sin-1â¡tanâ¡r

Topic: Physics, Ray Optics, NEET
If a ray travelling in the direction 12i^+3j^ is incident on a plane mirror, after reflection, the ray travels along the direction 12i^-3j^. The angle of incidence is

Options:
A 45°
B 75°
C 30Â°
D 60o

The correct answer is:
30°

Solution:
The angle between the incident ray and the reflected ray
cosδ=i^+3j^.i^-3j^2×2
cos⁡δ=-12⇒δ=120°
180°-i+r=120°

⇒ 2i=60°

⇒ i=30°

Topic: Physics, Ray Optics, NEET
If a ray travelling in the direction 12i^+3j^ is incident on a plane mirror, after reflection, the ray travels along the direction 12i^-3j^. The angle of incidence is

Options:
A 45o
B 75o
C 30o
D 60o

The correct answer is:
60o

Solution:
Angle between incident ray and reflected ray
cosâ¡Î´=i^+3j^.i^-3j^2.2
cosâ¡Î´=-12âÎ´=120o
180-â i=120â â i=60o

Topic: Physics, Ray Optics, NEET
If a reaction has positive enthalpy change and positive entropy change, under what condition will the reaction be spontaneous?

Options:
A The reaction will always be spontaneous
B The reaction will be spontaneous at low temperature.
C The reaction will be spontaneous at high temperature.
D The reaction will never be spontaneous

The correct answer is:
The reaction will be spontaneous at high temperature.

Solution:
Correct Option is : (C)
The reaction will be spontaneous at high temperature.

Topic: Chemistry, Thermodynamics (C), NEET
If a reaction vessel at 400°C is charged with an equimolar mixture of CO and steam such that pCO = pH2O = 4.0 bar, what will be the partial pressure of H2at equilibrium? Given Kp = 10.1 at 400°C.

Options:
A 4.0 bar
B 2.0 bar
C 3.0 bar
D 6.4 bar

The correct answer is:
3.0 bar

Solution:
Correct Option is : (C)
3.0 bar

Topic: Chemistry, Ionic Equilibrium, NEET
If a satellite is moving around the earth in an orbit of 5R radius, here R = radius of the earth. The minimum kinetic energy required to be provided to the satellite such that it escapes the gravitational field of the earth is (M and m are masses of earth and satellite respectively)

Options:
A GMm5R
B GMm15R
C GMm10R
D GMm2R

The correct answer is:
GMm10R

Solution:
if a satellite is moving in a orbit of 5R radius,
The total energy of satellite (binding energy)
=ET=-1 2GMm5R
The energy that needs to be provided = (- Binding energy)
âEto be given=GMm10 R

Topic: Physics, Gravitation, NEET
If a sequence of non-template strand is 5'- ATGTGACGAG-3', the sequence of anticodon on tRNA will be

Options:
A AUGUGACGAG
B UACACUGCUC
C ATGTGACGAG
D AUGUGTCCTA

The correct answer is:
AUGUGACGAG

Solution:
The strand with polarity and the sequence same as RNA, except thymine at the place of uracil, is displaced during transcription. This strand is called the coding strand, sense strand or non-template strand.

Topic: Biology, Molecular Basis of Inheritance, NEET
If a simple pendulum of length, L has maximum angular displacement α, then the maximum kinetic energy of bob of mass M is

Options:
A 12MLg
B Mg2L
C MgL(1-cos⁡α)
D MgL sin α2

The correct answer is:
MgL(1-cos⁡α)

Solution:
Given, mass of bob=M
Length of simple pendulum=L
Now, in âOAB, cosâ¡Î±=OAOB
or cosâ¡Î±=OAL
or AO=L cos Î±
and AP=OP-AO
AP=L-L cos Î±
or h=L(1-cos Î±)
The maximum kinetic energy of bob
= Maximum potential energy
KE=Mgh
KE=MgL(1-cos Î±)

Topic: Physics, Oscillations, NEET
If a simple pendulum oscillates with an amplitude of 50 mm and time period of 2 s, then its maximum velocity is

Options:
A 0.10 m s-1
B 0.15 m s-1
C 0.8 m s-1
D 0.26 m s-1

The correct answer is:
0.15 m s-1

Solution:
vmax=aω=a×2πT=50×10-3×2π2=0.15 m s-1

Topic: Physics, Oscillations, NEET
If a small amount of antimony is added to germanium crystal

Options:
A the antimony becomes an acceptor atom
B there will be more free electrons than holes in the semiconductor
C its resistance is increased
D it becomes a $p$-type semiconductor

The correct answer is:
there will be more free electrons than holes in the semiconductor

Solution:
When a small amount of antimony is added to germanium crystal, the crystal becomes $n$-type semiconductor because antimoney is a pentavalent substrate. It excess free electrons.

Topic: Physics, Semiconductors, NEET, NEET 2011 (Screening)
If a solution is described as 10% glucose in water by mass, what does it mean?

Options:
A There are 10 grams of glucose in 100 grams of the solution.
B There are 90 grams of glucose in 100 grams of the solution.
C There are 10 grams of glucose in 90 grams of the solution.
D There are 100 grams of glucose in 10 grams of the solution.

The correct answer is:
There are 10 grams of glucose in 100 grams of the solution.

Solution:
The paragraph gives an example of how to interpret a mass percentage description.

Topic: Chemistry, Solutions, NEET
If a solution of CuSO4 is electrolyzed for 10 minutes with a current of 1.5 amperes, what is the mass of copper deposited at the cathode?

Options:
A 0.0387 g
B 0.1935 g
C 0.2938 g
D 0.4271 g

The correct answer is:
0.2938 g

Solution:
The mass of copper deposited can be calculated using Faraday's laws of electrolysis and the given conditions of current and time. Given, t = 600 s charge = current × time = 1.5 A × 600 s = 900 C According to the reaction: Cu2+(aq) + 2e– = Cu(s) We require 2F or 2 × 96487 C to deposit 1 mol or 63 g of Cu. For 900 C, the mass of Cu deposited = (63 g mol-1 × 900

Topic: Chemistry, Electrochemistry, NEET
If ' $a$ ' stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively,

Options:
A $\frac{1}{2} a : \frac{\sqrt{3}}{4} a: \frac{1}{2 \sqrt{2}} a$
B $\frac{1}{2} a: \sqrt{3} a: \frac{1}{\sqrt{2}} a$
C $\frac{1}{2} a: \frac{\sqrt{3}}{2} a: \frac{\sqrt{2}}{2} a$
D $1 a: \sqrt{3} a: \sqrt{2} a$

The correct answer is:
$\frac{1}{2} a : \frac{\sqrt{3}}{4} a: \frac{1}{2 \sqrt{2}} a$

Solution:
For simple cubic,
$\begin{aligned}
\therefore & a & =2 r \\
\therefore & r & =\frac{a}{2}
\end{aligned}$
For body centred cubic,
$\begin{aligned}
& a=\frac{4 r}{\sqrt{3}} \\
& r=\frac{\sqrt{3} a}{4}
\end{aligned}$
For face centred cubic,
$\begin{aligned}
& a=2 \sqrt{2} r \\
& r=\frac{a}{2 \sqrt{2}}
\end{aligned}$
Hence, the ratio of radii in simple cubic, body centred cubic and face centred cubic is $\frac{a}{2}: \frac{\sqrt{3} a}{4}: \frac{a}{2 \sqrt{2}}$

Topic: Chemistry, Chemical Kinetics, NEET, NEET 2008 (Screening)
If ′a′ stands for the edge length of the cubic systems: simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these system will be respectively -

Options:
A 12aÂ :Â 32aÂ :Â 22Â a
B 1aÂ :Â 3aÂ :Â 2a
C 12 a : 34 a : 122a
D 12aÂ :Â 3aÂ :Â 12a

The correct answer is:
12 a : 34 a : 122a

Solution:
For the different unit cells the relation between 'a' & 'r' is:
sc 2r=a
fcc 4r=2a
bcc 4r=3a

Topic: Chemistry, Solid State, NEET
If a star can convert all the He nuclei completely into oxygen nuclei, the energy released per oxygen nuclei is ( Mass of the nucleus is 4.0026 amu and mass of oxygen nucleus is 15.9994 amu)

Options:
A 7.6 MeV
B 56.12 MeV
C 10.24 MeV
D 23.9 MeV

The correct answer is:
10.24 MeV

Solution:
4( 2He4)= 8O16
Mass defect,
âm={4(4.0026)-15.9994} amu =0.01 lamu
â´ Energy released per oxygen nuclei
=(0.011)(931.48) MeV
=10.24 MeV

Topic: Physics, Nuclear Physics, NEET
If a star can convert all the He nuclei completely into oxygen nuclei, the energy released per oxygen nuclei is:(Mass of the helium nucleus is 4.0026 amu and mass of oxygen nucleus is 15.9994 amu)

Options:
A 7.6 MeV

B 56.12 MeV

C 10.24 MeV

D 23.4 MeV

The correct answer is:
10.24 MeV

Solution:
4( 2He4 ) = 8O16
Mass defect, Îm=4(4.0026)-15.9994=0.011amu
Therefore Energy released per oxygen nuclei
= (0.011) (931. 48) MeV
= 10.24 MeV
Therefore the Correct answer is (10.24 MeV).

Topic: Physics, Nuclear Physics, NEET
If a stone is to hit at a point which is at a horizontal distance 100 m away and at a height 50 m above the point from where the stone starts, then what is the value of initial speed u if the stone is launched at an angle 45°?

Options:
A 102Â m/s
B 105 m/s
C 205 m/s
D 2010Â m/s

The correct answer is:
205 m/s

Solution:
From equation of trajectory,
y=xtan⁡θ-gx22y2cos2⁡θ
⇒50=100tan⁡45°-1010022u2cos2⁡45°
⇒u2=10025
⇒u=205 m/s

Topic: Physics, Motion In Two Dimensions, NEET
If a subcellular fraction from liver tissue exhibits a high level of acid lipases, proteases, carbohydrases activity. The organelle associated with it will be

Options:
A Nuclei
B Lysosomes
C Mitochondria
D Golgi bodies

The correct answer is:
Lysosomes

Solution:
Lysosomes are membrane-bound vesicular structures formed by the process of packaging in the Golgi apparatus. The isolated lysosomal vesicles have been found to be very rich in almost all types of hydrolytic enzymes (hydrolases â lipases, proteases, carbohydrases) optimally active at the acidic pH. These enzymes are capable of digesting carbohydrates, proteins, lipids, and nucleic acids.

Topic: Biology, Cell - The Unit of Life, NEET
'If a superior competitor is removed from the area, there is always an increased population of the otherwise exploited species". Above given phenomenon is according to -

Options:
A principle of competitive exclusion.
B principle of resource partioning.
C principle of competitive release.
D More than one option is correct.

The correct answer is:
principle of competitive release.

Solution:
According to Colonell's elegant field experiment, in intertidal are of Scottland Barnacle Balanus are competitively superior species and predominates in the area and Barnacle Catharmalus is competitively inferior species and in confined to a narrow zone in that area. Removal of superior Balanus led to rapid rise in the population of inferior Cathamalus this is called competitive release.

Topic: Biology, Organisms and Populations, NEET
If a superior competitor is removed from the area, there is always an increased population of the otherwise exploited species. This phenomenon is called

Options:
A Competitive inclusion
B Competitive release
C Gause's principle
D Resource partioning

The correct answer is:
Competitive release

Solution:
According to Connell's elegant field experiment, in the intertidal area of Scottland, Barnacle Balanus is a competitively superior species and predominates in the area and Barnacle Cathamalus is competitively inferior species and is confined to a narrow zone in that area. Removal of superior Balanus led to a rapid rise in the population of inferior Cathamalus. This is called competitive release.

Topic: Biology, Organisms and Populations, NEET
If a the length of the side of a cube, the distance between the body centered atom one corner atom in the cube will be

Options:
A 23a
B 43a
C 34a
D 32a

The correct answer is:
32a

Solution:
In a regular cube let the edge length be a.

Then the face diagonal will be 2a

Body diagonal is 3a.

The distance between the center of the cube and the corner is the half distance of the body diagonal i.e 3a2.

Topic: Chemistry, Solid State, NEET, NEET 2014
If a thermos flask contains hot coffee and is sealed, what type of system does it represent in thermodynamics?

Options:
A An open system
B A closed system
C An isolated system
D A dynamic system

The correct answer is:
An isolated system

Solution:
A sealed thermos flask does not allow any exchange of energy or matter with the surroundings, making it an isolated system.

Topic: Chemistry, Thermodynamics (C), NEET
If a torch is used in place of monochromatic light in Young's experiment what will happen?

Options:
A Fringe will appear for a moment then, it will disappear
B Fringes will occur as from monochromatic light
C Only bright fringes will appear
D No fringes will appear

The correct answer is:
No fringes will appear

Solution:
No fringe will appear, when we used torch in place of monochromatic light because waves reaching at any point on the screen do not have a constant phase difference, as phase difference due to different colours changes randomly. Therefore, maxima and minima would also change their positions randomly and in quick succession. This will result in general illumination on the screen.

Topic: Physics, Wave Optics, NEET
If a trivalent atom replaces a few silicon atoms in three-dimensional network of silicon dioxide, what would be the type of charge on the overall structure?

Options:
A Positive
B Negative
C Neutral
D Variable

The correct answer is:
Negative

Solution:
Correct Option is : (B)
Negative

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
If a vector $2 \hat{i}+3 \hat{j}+8 \hat{k}$ is perpendicular to the vector $4 \hat{j}-4 \hat{i}+\alpha \hat{k}$ then the value of $\alpha$ is:

Options:
A $\frac{1}{2}$
B $- \frac{1}{2}$
C 1
D -1

The correct answer is:
$- \frac{1}{2}$

Solution:
$\vec{a}=2 \hat{i}+3 \hat{i}+8 \hat{k}, b=4 \hat{j}+3 \hat{i}+\alpha \hat{k}$
$\begin{aligned}
& \vec{a} \cdot \vec{b}=0, \text { if } a^{-1} \cdot b^{-1} \\
& \therefore(2 \hat{i}+3 \hat{j}+8 \hat{k}) \cdot(-4 i+4 j+\alpha k)=\frac{1}{2} \\
& \Rightarrow \alpha=-\frac{1}{2}
\end{aligned}$

Topic: Physics, Mathematics in Physics, NEET, NEET 2005
If a vector A is given as A=4i^+3j^+12k^, then the angle subtended with the x-axis is

Options:
A sin-1⁡413
B sin-1⁡313
C cos-1⁡313
D cos-1⁡413

The correct answer is:
cos-1⁡413

Solution:
Let α is the angle which A makes with x - axis, then
cos⁡α=AxA=442+32+122=413
α=cos-1⁡413

Topic: Physics, Motion In Two Dimensions, NEET
If a wavelength of above 680 nm is available for excitement, the product of the reaction will be

Options:
A O2
B ATP and NADPH2
C ATP
D NADPH2

The correct answer is:
ATP

Solution:
Cyclic photophosphorylation occurs when only light of wavelengths beyond 680 nm are available for excitation. The product of cyclic photophosphorylation is ATP.

Topic: Biology, Photosynthesis in Higher Plants, NEET
If a wheat variety of red kernels is crossed with white-kernelled wheat, what would be its genotypic ratio? (Note: It is a polygenic trait controlled by 2 pairs of polygenes.)

Options:
A 9 : 7
B 1 : 10 : 4 : 1
C 1 : 4 : 6 : 4 : 1
D 1 : 2 : 4 : 2 : 4 : 2 :1

The correct answer is:
1 : 4 : 6 : 4 : 1

Solution:
When traits are controlled by three or more genes, they are called polygenic traits and their inheritance is called as polygenic inheritance. Polygenic inheritance is influenced by the environment as well and not just the polygenes.
Kernel colour of wheat is regulated AA and BB that is two pairs of genes. Genes A and B express the red colour of kernel. They are dominant over their recessive alleles. When a red kernel wheat variety is crossed with white kernel wheat, the ratio obtained in F2 is 1 : 4 : 6 : 4 : 1 due to the polygenic inheritance.

Topic: Biology, Principles of Inheritance and Variation, NEET
If a wire of resistance R is melted and re-casted to half of its length, then the new resistance of the wire will be

Options:
A R 2
B R
C 2R
D R 4

The correct answer is:
R 4

Solution:
Resistance R= ρl A = ρ l 2 V
⇒R∝ l 2
as new length is l 2 ,
new resistance R ' = R 4

Topic: Physics, Current Electricity, NEET
If activation energy, Ea of the reaction is equal to RT then

Options:
A The rate of reaction will be independent on initial concentration of reactant.
B The rate constant becomes approximately equal to 37% of the Arrhenius constant
C The rate of reaction becomes infinite
D The rate of reaction always be first order.

The correct answer is:
The rate constant becomes approximately equal to 37% of the Arrhenius constant

Solution:
k=A e-Ea/RT
When Ea=RT, then k=Ae=A2.718 -~ 0.37 A
The rate constant becomes approximately equal to 37% of the Arrhenius constant

Topic: Chemistry, Chemical Kinetics, NEET
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

Options:
A T: 20 ; G: 30 ; C: 20
B T: 20 ; G: 20 ; C: 30
C T: 30 ; G: 20 ; C: 20
D T: 20 ; G: 25 ; C: 25

The correct answer is:
T: 30 ; G: 20 ; C: 20

Solution:
According to Chargaff's principle, A is equal to T and G is equal to C. Hence, if the total is 100 and A is 30 then T will also be 30. Likewise G+C will be 40, so, G=20,C=20.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2021
If after cutting through the dorsal root of a spinal nerve of a mammal, an associated receptor in the skin was stimulated, the animal would

Options:
A show no response
B show a normal but slow response
C still able to feel the stimulation
D respond but only at a different level of spinal cord

The correct answer is:
show no response

Solution:
Spinal nerve is mix type of nerve and carries motor, sensory and autonomic signals. Spinal nerve is formed from its dorsal and ventral roots. Ventral root carries motor information from brain which is efferent motor root and dorsal root carries sensory information to the brain which is afferent sensory root. If the dorsal root is damaged, there would be no sensations reaching the spinal cord and hence there would be no motor response

Topic: Biology, Neural Control and Coordination, NEET
If aleurone layer contains 12 chromosomes, the ovary wall will contain:

Options:
A 12
B 18
C 25
D 8

The correct answer is:
8

Solution:
Double fertilization is a unique characteristic observed in the Angiosperm group of plants. In this, two fertilizations are observed - 1st between the female and male gametic cells forming zygote and 2nd is between the second male gamete and polar nuclei forming the primary endosperm nucleus. In it, a 2n zygote forms in first fertilization and a 3n primary endosperm nucleus forms in second fertilization which results in formation of aleurone layer in monocotyledons.
Aleurone layer has 12 chromosomes and is 3n. n is 4 chromosomes.
Ovary of the plant is diploid that is 2n. Thus, it will have 8 chromosomes.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET