the guard cells
Each stoma is composed of two specialized cells called guard cells that control the opening and closing of the pore. This structure allows for gas exchange, such as the intake of carbon dioxide for photosynthesis and the release of oxygen and water vapor.
The opening that allows for gas exchange in plants is called a stomata. Stomata are small pores found on the surface of leaves that open and close to regulate the exchange of gases, such as carbon dioxide and oxygen, between the plant and the environment.
Vent
A volcano or volcanic vent is an opening in the earth's surface that allows melted rock (lava) to flow out.
In a circuit, the purpose of a switch is to control the current flow to the load by opening the circuit (off) or closing the circuit (on). When the circuit is open, the is no complete loop through which the current can flow. When the switch closes the circuit, it restores the loop, and thus allows the current to flow.
The opening in a leaf that allows for gas exchange is called a stoma (plural: stomata). Stomata are typically located on the underside of the leaf and are bordered by guard cells that regulate their opening and closing to control gas exchange.
The stomata, located on the surface of plant leaves, are the organelles responsible for opening and closing to regulate gas exchange and water loss. They consist of specialized cells that can control the size of the pore.
Each stoma is composed of two specialized cells called guard cells that control the opening and closing of the pore. This structure allows for gas exchange, such as the intake of carbon dioxide for photosynthesis and the release of oxygen and water vapor.
The iris has an opening, called the pupil, through which light enters the eye.
The opening of a camera that allows light to pass through is called the aperture. By adjusting the size of the aperture, photographers can control the amount of light entering the camera, which in turn affects the exposure and depth of field of the resulting photograph.
Stomata and lenticells
The opening that allows for gas exchange in plants is called a stomata. Stomata are small pores found on the surface of leaves that open and close to regulate the exchange of gases, such as carbon dioxide and oxygen, between the plant and the environment.
Vent
The adjustable stage opening on a microscope is used to control the amount of light illuminating the specimen.
A switch in an electric circuit is used to control the flow of electricity by opening or closing the circuit. It allows users to turn the circuit on or off, enabling them to control the flow of electricity to various components in the circuit.
A volcano or volcanic vent is an opening in the earth's surface that allows melted rock (lava) to flow out.
Opening a file...for writing!