Underneath the leaves, there are very small holes called (stomata/cuticles) that allow air to get inside9. (Stomata/Cuticles) is a waxy coat that help plants keep water inside10. Inside the plant, there are tubes of dead cells called (xylem, phloem) that help transport water and minerals up and down the plant.11. Inside the plant, there are tubes of living cells called (xylem, phloem) that help transport sugars to areas of the plant that need it.12. The flower part called ‘sepal’ is usually (green/yellow) in colour

Tiny pores are found on the surface of the leaves of plants. These pores are calledstomata. These stomata surrounded by the kidney shaped guard cells provide manyvital functions to the plants.Which of the following functions is not served by the stomata for the plants?(A) Exchange of gases, particularly CO2 and O2, with atmosphere(B) Loss of water in the form of vapours during transpiration(C) Helps to create pressure for the water to rise upward, by its process oftranspiration.

(a) In plants, water is transported through(i) xylem (ii) phloem(iii) stomata (iv) root hair(b) Water absorption through roots can be increased by keeping theplants(i) in the shade(ii) in dim light(iii) under the fan(iv) covered with a polythene bag4. Why is transport of materials necessary in a plant or in an animal?Explain.5. What will happen if there are no platelets in the blood?6. What are stomata? Give two functions of stomata.7. Does transpiration serve any useful function in the plants? Explain.8. What are the components of blood?9. Why is blood needed by all the parts of a body?10. What makes the blood look red?11. Describe the function of the heart.12. Why is it necessary to excrete waste products?13. Draw a diagram of the human excretory system and label the variousparts.Extended Learning — Activities and Projects1. Find out about blood groups and their importance.2. When a person suffers from chest pain, the doctor immediately takesan ECG. Visit a doctor and get information about ECG. You may evenlook up an encyclopaedia or the internet.Did you know?There is no substitute for blood. If people lose blood from surgery or injuryor if their bodies cannot produce enough blood, there is only one way toget it ó through transfusion of blood donated by volunteers. Blood isusually in short supply. Donating blood does not decrease the strength ofthe donors.

What is transpiration in plants?The absorption of water through the leavesThe movement of water through a plant due to evaporation from the leavesThe movement of water through the phloem cellsThe absorption of water by the root hair cells2Which substances enter and leave the plant through the stomata?Water and oxygen enter; carbon dioxide leavesOxygen enters; carbon dioxide and water leaveCarbon dioxide and water enter; oxygen leavesCarbon dioxide enters; water and oxygen leaves3Which cells control the opening and closing of the stomata?Phloem cellsXylem cellsGuard cellsPalisade cells4What happens to the rate of transpiration when the temperature is increased?It decreasesIt increasesIt stays the sameIt stops altogether5Why does the rate of transpiration decrease in very humid conditions?Because the rate of photosynthesis decreasesBecause there will be less water inside the leaf than in the airBecause there will be more water inside the leaf than in the air Because the rate of photosynthesis increases6Why are stomata normally found on the underside of leaves?So that they are nearer the ground To allow water to escape from the leaves by gravitySo that they are protected from rainSo that they are shaded from the sun

Pieces of leaf epidermis were peeled from the plant Commelina communis. The pieces were then placed in a solution of a dye that binds to potassium ions. You would expect that most of the dye would be concentrated in theAsieve cells when the stomata are closed.Bguard cells when the stomata are closed.Cepidermal cells when the stomata are open.Depidermal cells when the stomata are closed.

The parts of the plant that allow for gas exchange are theMultiple Choiceroots.stomata.xylem.phloem.cuticle.