Openings in the plant leaves,as shown in the image below,are called ___ and allow for the exchange of carbon dioxide and oxygen. 
Definitions:
Limited Distribution
A strategic choice by a company to offer its products or services at a select few outlets, often to maintain exclusivity or control over the brand image.
Marchesa Wedding Gown
A high-end bridal dress designed by the luxury fashion brand Marchesa, known for its elegant and elaborate designs.
Secret Antiperspirant
A branded personal care product designed to prevent perspiration and body odor.
Derived Demand
Demand for a product or service that arises from the demand for another product or service.
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