Answer: Helps the plant breathe: The epidermis of the leaf contains guard cells that control and regulate the small pores on the undersurface of the leaves. These pores are called stomata. Stomata are responsible for regulating water in and out of the cell. It is also responsible for the exchange of gases across the epidermis.
 
        
                    
             
        
        
        
Conservation is the protection of an organism or a group of organisms (like an endangered species or forests).
Biodiversity is the numerous amounts of species habitated in our earth. The more biodiversity, the better.
Conservation protects biodiveristy, thus, allowing more species to survive and thrive.
        
                    
             
        
        
        
From within the Moon's penumbra, a partial solar eclipse can be seen. Like any other opaque objects illuminated by a light source, the Moon and the Earth cast shadows into space as they block the sunlight that hits them. Each shadow has 3 different areas: the umbra, the penumbra, and the antumbra.
 
        
             
        
        
        
A cell membrane is compared to a window screen because of its translucent properties. Like it allows oxygen to come through or it resists invader who tries to come into the cell.
Your answer is Cell membrane.
        
             
        
        
        
Because they have so many children at once.