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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Is an onion a root or a stem?

Summary Introduction

To explain: Whether onion is a root or stem.

Concept introduction: Onion that is also known as bulb onion or common onion is a vegetable, which is most widely cultivated species of the genus Allium. Onion plant has a fan of hollow, bluish-green leaves and a bulb in the base of the plant. Onions become pungent when they are chopped, as they contain certain chemical substances that irritate the eyes.

Explanation

Onion is a stem. Onion is one among the family of plants that has a modified stem. Bulb is the modified stem in the onion. The bulb consists of a short, flattened stem that is encased in overlapping layers of thickened modified leaves called scales. The lower portion of the bulb’s basal plate gives rise to its roots and the upper portion gives rise to scales and new shoots...

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