Question : In plants water is absorbed by the root hairs by a proces called :
Option 1: Transpiration
Option 2: Respiration
Option 3: Perspiration
Option 4: Osmosis
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Correct Answer: Osmosis
Solution : The correct option is - Osmosis.
Through the mechanism of osmosis, plants are able to take in water and mineral ions from the soil. Water molecules can travel through a membrane that is selectively permeable by a process called osmosis. In this process, water travels from an area of high concentration to an area of low concentration. The cytoplasm of the root hair cell has a lower water potential than soil water. A huge surface area on root hair cells allows for rapid osmosis and water absorption.
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Question : Excess amount of absorbed water by plants is liberated out by :
Option 1: Evaporation
Option 2: Osmosis
Option 3: Diffusion
Option 4: Transpiration
Question : Root hairs arise from
Option 1: cortex
Option 2: pericycle
Option 3: epidermis
Option 4: endodermis
Question : _______forces water through a semipermeable membrane and removes contaminants.
Option 1: Boiling
Option 2: Distillation
Option 3: Reverse Osmosis
Option 4: Filtration
Question : The rhythmic rise and fall of ocean water twice a day is called
Option 1: Tide
Option 2: Ocean current
Option 3: Wave
Option 4: Water cycle
Question : Production of alcohol from organic compound by microorganisms is known as:
Option 1: combustion
Option 2: fermentation
Option 3: anaerobic respiration
Option 4: aerobic respiration
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