Answer:
cell wall,vacoule,and plastids are not present
The correct answer is A) and B). Hope this helps.
When a wave has a height of 5 feet and a wavelength of 15 feet then it has a wave base of 7.5 feet. Wave base is equal to the half of the wavelength so if you consider your wavelength to be 15 feet then it is divided into 2 that would give you answer of 7.5 feet.
Drinking water shortages? Water across the world isn't purified which without purification doesn't quench thirst.