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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 vertical spring with a force constant $k$ is fixed on a table. A ball of mass $m$ at a height $h$ above the free upper end of the spring falls vertically on the spring so that the spring is compressed by a distance $d$. The net work done in the process is:
A current loop in a magnetic field:
Which of the following is not an inhibitory substance governing seed dormancy?
Incorrect order among the following is:
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:
In an ideal transformer, the turns ratio is $N_p/N_s = 1/2$. The ratio $V_s:V_p$ is equal to (the symbols carry their usual meaning):
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:
Which of the following species is not stable?
A wire carrying current $I$ has the shape as shown in the adjoining figure. Linear parts of the wire are very long and parallel to the X-axis while the semicircular portion of radius $R$ is lying in the Y-Z plane. The magnetic field at point $O$ is:
Given below are some statements about plant growth regulators. Which of the following is incorrect?
Cell elongation in internodal regions of the green plants takes place due to:
Who coined the term 'Kinetin'?
Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:
The major organic product in the reaction, $CH_3 — O — CH(CH_3)_2 + HI \rightarrow \text{Product}$ is: