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Which hormone is used to induce immediate stomatal closure in leaves?
What is the site of perception of photoperiod necessary for induction of flowering in plants?
A straight conductor carrying current $I$ splits into two parts as shown in the figure. The radius of the circular loop is $R$. The total magnetic field at the centre $P$ of the loop is:
Which hormone is responsible for fruit ripening?
Which of the following PGR is present in coconut milk which is used in tissue culture?
"Foolish seedling" disease of rice led to the discovery of:
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
A square loop ABCD carrying a current $i$ is placed near and coplanar with a long straight conductor XY carrying a current $I$. The net force on the loop will be:
A current loop in a magnetic field:
Which of the following is not an inhibitory substance governing seed dormancy?
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
The living differentiated cells, that lost the capacity to divide anymore, can regain the capacity of division under certain conditions. This phenomenon is termed as:
Two toroids 1 and 2 have total no. of turns 200 and 100 respectively with average radii 40 cm and 20 cm respectively. If they carry the same current i, what will be the ratio of the magnetic fields along the two loops?
$4.0 \text{ gm}$ of gas occupies $22.4 \text{ litres}$ at NTP. The specific heat capacity of the gas at a constant volume is $5.0 \text{ J K}^{-1}\text{mol}^{-1}$. If the speed of sound in the gas at NTP is $952 \text{ ms}^{-1}$, then the molar heat capacity at constant pressure will be: ($R=8.31 \text{ J K}^{-1}\text{mol}^{-1}$)
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
Seed dormancy is due to:
The maximum growth rate occurs in:
What is necessary for ripening of fruits:
A particle moving with velocity $\vec{v}$ is acted by three forces shown by the vector triangle $PQR$. The velocity of the particle will: