Biology
The ultimate source of organic evolution is
BiologyGeneral
- Natural selection
- Sexual reproduction
- Hormonal action
- Mutations
Answer:The correct answer is: Mutations
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Related Questions to study
maths-
If
are in A.P with common difference
then sind
terms] 
If
are in A.P with common difference
then sind
terms] 
maths-General
maths-
The sum of all integers between 50 and 500 which are divisible by 7 is
The sum of all integers between 50 and 500 which are divisible by 7 is
maths-General
maths-
digits )=
digits )=
maths-General
maths-
In a
as shown in figure given that
, then the value of
is

null





In a
as shown in figure given that
, then the value of
is

maths-General
null





physics-
A bob of mass M is suspended by a massless string of length L. The horizontal velocity
at position A is just sufficient to make it reach the point B. The angle
at which the speed of the bob is half of that at A, satisfies

Velocity of the bob at the point A
(i)





A bob of mass M is suspended by a massless string of length L. The horizontal velocity
at position A is just sufficient to make it reach the point B. The angle
at which the speed of the bob is half of that at A, satisfies

physics-General
Velocity of the bob at the point A
(i)





physics-
A particle of mass
attracted with a string of length
is just revolving on the vertical circle without slacking of the string. If
and
are speed at position
and
then

At 
At
and at
Thus,
Also,
So,

At
and at
Thus,
Also,
So,
A particle of mass
attracted with a string of length
is just revolving on the vertical circle without slacking of the string. If
and
are speed at position
and
then

physics-General
At 
At
and at
Thus,
Also,
So,

At
and at
Thus,
Also,
So,
physics-
A bob of mass
is suspended by a massless string of length
. The horizontal velocity
at position
is just sufficient to make it reach the point
. The angle
at which the speed of the bob is half of that at
, satisfies


A bob of mass
is suspended by a massless string of length
. The horizontal velocity
at position
is just sufficient to make it reach the point
. The angle
at which the speed of the bob is half of that at
, satisfies

physics-General

physics-
A body of mass
is moving with a uniform speed
along a circle of radius
, what is the average acceleration in going from
to
?

Here, 
Change in velocity is going from
to
= 
Average acceleration
Change in velocity is going from
Average acceleration
A body of mass
is moving with a uniform speed
along a circle of radius
, what is the average acceleration in going from
to
?

physics-General
Here, 
Change in velocity is going from
to
= 
Average acceleration
Change in velocity is going from
Average acceleration
physics-
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

Range horizontal initial velocity
In path 4 range is maximum so football possess maximum horizontal velocity in the path
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

physics-General
Range horizontal initial velocity
In path 4 range is maximum so football possess maximum horizontal velocity in the path
physics-
A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position X are respected by

The forces acting on the ball will be (i) in the direction opposite to its motion frictional force and(ii) weight .
A boy throws a cricket ball from the boundary to the wicket-keeper. If the frictional force due to air cannot be ignored, the forces acting on the ball at the position X are respected by

physics-General
The forces acting on the ball will be (i) in the direction opposite to its motion frictional force and(ii) weight .
physics-
A projectile is thrown at an angle of to the horizontal from point . At the same time, another projectile is thrown with velocity upwards from the point vertically below the highest point. For to collide with should be

Equating velocities along the vertical,
A projectile is thrown at an angle of to the horizontal from point . At the same time, another projectile is thrown with velocity upwards from the point vertically below the highest point. For to collide with should be

physics-General
Equating velocities along the vertical,
physics-
In a two dimensional motion of a particle, the particle moves from point
, position vector
. If the magnitudes of these vectors are respectively,
=3 and
and the angles they make with the
-axis are
and 15
, respectively, then find the magnitude of the displacement vector

Displacement 
angle between
and 

From figure

cos


angle between
From figure
In a two dimensional motion of a particle, the particle moves from point
, position vector
. If the magnitudes of these vectors are respectively,
=3 and
and the angles they make with the
-axis are
and 15
, respectively, then find the magnitude of the displacement vector

physics-General
Displacement 
angle between
and 

From figure

cos


angle between
From figure
physics-
A particle is moving on a circular path of radius
with uniform velocity
. The change in velocity when the particle moves from
to
is

Change in velocity 
A particle is moving on a circular path of radius
with uniform velocity
. The change in velocity when the particle moves from
to
is

physics-General
Change in velocity 
physics-
A fighter plane enters inside the enemy territory, at time
with velocity
and moves horizontally with constant acceleration
(see figure). An enemy tank at the border, spot the plane and fire shots at an angle
with the horizontal and with velocity
. At what altitude
of the plane it can be hit by the shot?
If it is being hit then

or





or

A fighter plane enters inside the enemy territory, at time
with velocity
and moves horizontally with constant acceleration
(see figure). An enemy tank at the border, spot the plane and fire shots at an angle
with the horizontal and with velocity
. At what altitude
of the plane it can be hit by the shot?
physics-General
If it is being hit then

or





or

physics-
From an inclined plane two particles are projected with same speed at same angle
, one up and other down the plane as shown in figure, which of the following statements is/are correct?


So,
From an inclined plane two particles are projected with same speed at same angle
, one up and other down the plane as shown in figure, which of the following statements is/are correct?

physics-General

So,