Good to know Plants respire all the time, whether it is dark or light. They photosynthesise only when they are in the light.   Conditions Photosynthesis vs respiration Overall result Dark Respiration No photosynthesis Oxygen taken in Carbon dioxide given out Dim light Photosynthesis rate equals respiration rate Neither gas …

Fibre may be defined generally as a strand that is very long in comparison to its width. Or, it is a special type of elongated cells with thick walls corresponding to small cavities with pointed ends. • The walls of the fibre contains lignin and cellulose. • They may occur …

Gymnosperms are seed-producing plants that do not produce any covering surrounding the seed i.e. the seed remains naked. The word ‘Gymnosperm’ originates from Gk. ‘gymnos’ meaning ‘naked’ and Gk. ‘sperma’ meaning ‘seeds’. A Greek botanist named Theophrastus first used the term ‘Gymnosperm’ in 300 BC in his book ‘Enquiry into …