Which combination of tissues acts together to provide support to the hypocotyl of a seedling?

An object $2.4 \, m$ in front of a lens forms a sharp image on a film $12 \, cm$ behind the lens. $A$ glass plate $1 \, cm$ thick,of refractive index $1.50$,is interposed between the lens and the film with its plane faces parallel to the film. At what distance (from the lens) should the object be shifted to be in sharp focus on the film? (in $m$)

In a food chain,the total amount of living material is depicted by

$4 \ g$ of an ideal gas occupies $5.6035 \ L$ of volume at $546 \ K$ and $2 \ atm$ pressure. What is its molecular weight?

Which of the following mineral elements is responsible for the permeability of the cell membrane?

How many corners of $SiO_4$ units are shared in the formation of three-dimensional silicates?