According to apical cell theory, there is a single apical cell with three cutting faces in the shoot apex. This theory is applicable only for some higher algae, bryophytes and pteridophytes and not applicable to gymnosperms and angiosperms. This theory was given by: A. C.Nageli B. Hanstein C. Schmidt D. Clowes

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?