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Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in plants?
Which hormone promotes internode / petiole elongation in deep water rice?
The gaseous plant growth regulator is used in plants to:
One of the synthetic auxin is:
Bundle of His' is a part of which one of the following organs in humans?
A uniform conducting wire of length $12a$ and resistance $R$ is wound up as a current-carrying coil in the shape of: (i) an equilateral triangle of side $a$ (ii) a square of side $a$ The magnetic dipole moments of the coil in each case respectively are:
Effect of light and dark rhythm on plants is known as:
Formation of interfascicular cambium from fully developed parenchyma cells is an example of
Calcium is important in skeletal muscle contraction because it:
The characteristics and an example of a synovial joint in humans are:
The pivot joint between atlas and axis is a type of:
A long straight wire of radius $a$ carries a steady current $I$. The current is uniformly distributed over its cross-section. The ratio of the magnetic fields $B$ and $B'$ at radial distances $a/2$ and $2a$ respectively, from the axis of the wire, is:
The number of hydrogen bonded water molecules(s) associated with CuSO₄·5H₂O is:
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction:
Select the correct statement regarding the specific disorder of the muscular or skeletal system.
Which of the following joints would allow no movement?
Select the correct statement with respect to locomotion in humans:
A mass $m$ moves in a circle on a smooth horizontal plane with velocity $v_0$ at a radius $R_0$. The mass is attached to a string that passes through a smooth hole in the plane, as shown in the figure. The tension in the string is increased gradually and finally, $m$ moves in a circle of radius $\frac{R_0}{2}$. The final value of the kinetic energy is:
Consider the statements given below regarding contraception and answer as directed thereafter: (i) Medical Termination of Pregnancy (MTP) during first trimester is generally safe. (ii) Generally, chances of conception are nil until mother breast-feeds the infants upto two years. (iii) Intrauterine devices like copper-T are effective contraceptives. (iv) Contraception pills may be taken up to one week after coitus to prevent conception. Which two of the above statements are correct?
Lack of relaxation between successive stimuli in sustained muscle contraction is known as?