Table of Contents
- 1 What structure in the leaf controls the opening?
- 2 Which structure in the leaf controls the opening and closing of the stoma a cuticle b epidermis C guard cell D spongy mesophyll?
- 3 Where would the greatest number of chloroplasts be found in a leaf?
- 4 Which is structure in the leaf controls the opening and closing?
- 5 How is the osmotic pressure of the stomata controlled?
- 6 Where are the stomata located on a terrestrial plant?
What structure in the leaf controls the opening?
stomata
Carbon dioxide and oxygen cannot pass through the cuticle, but move in and out of leaves through openings called stomata (stoma = “hole”). Guard cells control the opening and closing of stomata. When stomata are open to allow gases to cross the leaf surface, the plant loses water vapor to the atmosphere.
Which structure in the leaf controls the opening and closing of the stoma a cuticle b epidermis C guard cell D spongy mesophyll?
Guard cellsGuard cells surround stomata and control their opening and closing. The stomata are the site of gas exchange in leaves, a process called transpiration.
Where would the greatest number of chloroplasts be found in a leaf?
Leaf mesophyll composed of parenchyma tissue. The elongated palisade parenchyma contains the largest number of chloroplasts per cell and is the primary site of photosynthesis in many plants.
Why is chlorophyll present in leaves?
Chlorophyll’s job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.
How does a stomata cell open and close?
The process of opening and closing is complex, involving ion channels and pumps and the pressure of water inside the guard cells.
Which is structure in the leaf controls the opening and closing?
5.Which structure in the leaf controls the opening and closing of the stoma? A. cuticle B. epidermis C. guard cell D. spongy mesophyll 4 | G E N B I O 2All right reserved. Only bonifide learner of Holy Infant College in Senior High SchoolDepartment can reproduce these materials.
How is the osmotic pressure of the stomata controlled?
The osmotic pressure is controlled by a regulated flow of K + and Ca + + (potassium and calcium ions) in/out of the cell. Yes — phototropin (photoreceptor proteins), triggered by light (day, stomata open; night closed). Guard cells are specialized cells in the epidermis of leaves, stems and other organs that are used to control gas exchange.
Where are the stomata located on a terrestrial plant?
Nice work! You just studied 25 terms! Now up your study game with Learn mode. Terrestrial plants have stomata on the surface of their leaves. Stomata are surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma.