00:01
The opening and closing of the stomata depends on the specific cells surrounding the stomata called the guard cells.
00:14
Based on the targidity of the guard cell, which is the entry of water into the guard cell, the stomata opens when the cells are targid, which means cells are filled with water.
00:35
And stomata closes when the cells are flaccid.
00:44
This means in the absence of water, the stomata closes to prevent excessive water loss.
00:51
The structures like trackids and vessel elements are all part of the xylem, while companion cell is a part of the phloem and not a part of the stomata.
01:17
Therefore, option a here is the correct answer.
01:23
Now, if we are moving on to the next statement, it says that all the vascular bundles contain xylem and phloem, which is true as xylem and floem together comprised from the vascular bundle and it can be present in two major arrangements.
01:54
These arrangements are conjoined arrangement for the presence of the two and there is also the collateral arrangement.
02:07
So not all vascular bundles are collateral as there are plants containing the conjoined arrangement as well in the specific plant parts...