Plant Tissue and Guard Cell Functions

The video tutorial explores the structure and function of plant tissues, focusing on the epidermal tissue system. It explains how the epidermis, cuticle, and epidermal hair protect plants and aid in water absorption. The video also details the structure and function of stomata, highlighting their role in gas exchange and water regulation. The tutorial emphasizes the importance of guard cells in controlling the opening and closing of stomatal pores to balance photosynthesis and water conservation.

What are the three main categories of plant tissue systems?

• Ground, Vascular, Dermal

• Epidermal, Ground, Vascular

• Dermal, Ground, Vascular

• Epidermal, Dermal, Vascular

What is the primary function of the epidermal tissue system?

• Nutrient transport

• Protection from external factors

• Water absorption

• Photosynthesis

Why is the cuticle absent in roots?

• Roots are underground

• Roots perform photosynthesis

• Roots need to absorb water

• Roots do not need protection

What is the function of root hairs?

• To transport nutrients

• To protect the plant from herbivores

• To perform photosynthesis

• To increase surface area for water absorption

What is the role of guard cells in stomata?

• To perform photosynthesis

• To regulate gas exchange

• To absorb water

• To protect the plant from herbivores

What process occurs through the stomatal pore besides gas exchange?

• Nutrient absorption

• Water loss by transpiration

• Photosynthesis

• Root growth

What shape are the guard cells in dicots?

• Bean-shaped

• Round

• Dumbbell-shaped

• Square

What is the function of subsidiary cells?

• To perform photosynthesis

• To protect guard cells and act as reservoirs

• To transport nutrients

• To absorb water

How do guard cells open the stomatal pore?

• By splitting

• By shrinking

• By rotating

• By swelling up

What happens to guard cells when the plant wants to conserve water?

• They split

• They shrink

• They swell up

• They rotate