1. | Guard cells invariably possess chloroplasts and mitochondria |
2. | Guard cells are always surrounded by subsidiary cells |
3. | Stomata are involved in gaseous exchange |
4. | Inner walls of guard cells are thick |
1. mitochondria
2. endoplasmic reticulum
3. chloroplasts
4. cytoskeleton
Given below is the diagram of a stomatal apparatus. In which of the following, all the four parts labelled as A, B, C and D are correctly identified:
A | B | C | D | |
1. | Guard cell | Stomatal aperture | Subsidiary Cell | Epidermal Cell |
2. | Epidermal Cell | Guard Cell | Stomatal aperture | Subsidiary cell |
3. | Epidermal Cell | Subsidiary Cell | Stomatal aperture | Guard Cell |
4. | Subsidiary Cell | Epidermal Cell | Guard Cell | Stomatal aperture |
Guard cells help in:
1. protection against grazing
2. transpiration
3. guttation
4. fighting against infection