Question

Select the cells that transports potassium ions and water in the presence of sunlight and low concentrations of carbon dioxide and make them rigid.

• A. Tracheids and vessel elements
• B. Guard cells
• C. Parenchyma cells
• D. Sieve tube members and companion cells
• E. Sclerenchyma cells

Answer 1

Answer: (A)

Tracheids and vessel elements

The minerals required by the plant is categorized under micronutrients and macronutrients. The micronutrients are required in very small quantity while the macronutrients are required in large quantity. There are nine macronutrients: carbon, hydrogen, and oxygen as well as nitrogen, potassium, calcium, phosphorus, magnesium, and sulfur. The seven micronutrient are iron, chlorine, copper, manganese, zinc, molybdenum, and boron. Tracheids and vessel elements are the nonliving cells that form continuous tubes and serve in the transport of water in vascular plants. Guard cells regulate opening and closing of stomata by intake of potassium ions and water in the presence of sunlight.

So, the correct answer is option A.