Select the correct statementa. During photosynthesis, oxygen is considered as an excretory product by plantsb. Stomata present are present in large numbers in the upper epidermis, that help in transpirationc. Lenticels in the leaves are specialized to eliminate oxygen, water and carbon-di-oxide.d. Resins, gums and ageing leaves are some ways by which plants excrete their waste products.only a,bonly b,donly a,donly c,d

Plant use completely different process for excretion as compared to animals. Which one of the following process is not followed by plant for excretion?AThey can get rid of excess water by transpirationBThey selectively filter toxic substance through their leavesCWaste products are stored as resins and gums in old xylem.DThey excrete waste substance into the soil around them

Excretion is an important process in both plants.Below is a list of processes that occur in plants.1. Flowering plants release chemicals that attract pollinators.2. Auxins that are produced in apical cells diffuse to the area of elongation.3. Carbon dioxide produced during respiration diffuses out of leaves via stomata.4. The common reed Phragmites australis releases acid from it's roots to destroy competing species.5. Excess chlorine and heavy metals are transferred to cells in the leaves. These substances are lost when the leaves fall by abscision.Which of the processes above are examples of excretion?Question 3Select one:A.3, 4 and 5B.Only 3 and 5C.2, 3 and 4D.3 only

State two processes through which plants excrete their metabolic wastes

1What is transpiration in plants?The absorption of water by the root hair cellsThe absorption of water through the leavesThe movement of water through a plant due to evaporation from the leavesThe movement of water through the phloem cells2Which substances enter and leave the plant through the stomata?Oxygen enters; carbon dioxide and water leaveCarbon dioxide and water enter; oxygen leavesWater and oxygen enter; carbon dioxide leavesCarbon dioxide enters; water and oxygen leaves3Which cells control the opening and closing of the stomata?Palisade cellsPhloem cellsGuard cellsXylem cells4What happens to the rate of transpiration when the temperature is increased?It stays the sameIt increasesIt decreasesIt stops altogether5Why does the rate of transpiration decrease in very humid conditions?Because there will be more water inside the leaf than in the air Because the rate of photosynthesis increasesBecause the rate of photosynthesis decreasesBecause there will be less water inside the leaf than in the air6Why are stomata normally found on the underside of leaves?So that they are shaded from the sunSo that they are nearer the ground So that they are protected from rainTo allow water to escape from the leaves by gravity

In conifers, transpiration is reduced due to the presence of :-(I) Needle-like leaves(II) Thin cuticle in leaves(III) Sunken stomata in leavesI onlyI and IIII and IIII and III