The opening and closing of stomatal pore depend uponOxygen concentration in cellsTemperature of the environmentWater in guard cellsConcentration of CO2 in stomata

The opening and closing of the stomatal pore primarily depend upon:OxygenTemperatureWater in the guard cellsConcentration of CO2       Which organisms primarily use photosynthesis to fulfil their carbon and energy requirements?HeterotrophsDecomposersAutotrophsOmnivores       Statement 1: Carbon dioxide and water are taken in by autotrophic organisms for the process of photosynthesis.Statement 2: These substances are converted into carbohydrates in the presence of sunlight and chlorophyll.Both Statement 1 and Statement 2 are true.Statement 1 is true, and Statement 2 is false.Statement 1 is false, and Statement 2 is true.Both Statement 1 and Statement 2 are false.       What is the process called when organisms acquire oxygen from outside the body and use it to break down food sources for cellular needs?DigestionPhotosynthesisFermentationCellular respiration       The small pores present on leaf’s surface are calledStomataChlorophyllGuard cellsNone of these       _______ is taken up by plants from the soil and is essential for various metabolic processes.CarbonIronOxygenVitamin B12       During photosynthesis, autotrophs take in which of the following from the outside?Carbon dioxideSunlightWaterAll of the above       Apart from leaves, where else does gaseous exchange occur across the surface?Stems onlyRoots onlyStems and rootsFlowers only       In which mode of nutrition an organism derives its food from the body of another living organism without killing it?Saprotrophic nutritionParasitic nutritionHolozoic nutritionAutotrophic nutrition       The characteristic processes observed in anaerobic respiration are:i) Presence of oxygenii) Release of carbon dioxideiii) Release of energyiv) Release of lactic acidi), ii) onlyi), ii), iii) onlyii), iii), iv) onlyiv) only

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.

Guard cells respond to conditions in the environment toA.regulate stomata to prevent an excessive amount of water loss.B.open stomata in response to sunlight and keep them open all day.C.keep stomata open in windy conditions for optimal uptake of carbon dioxide.D.keep stomata open in hot, dry conditions for optimal photosynthesis.

What are the functions of stomata and guard cells, and what would happen to a plant if these cells did not function correctly?Group of answer choicesStomata allow gases to enter and exit the plant. Guard cells regulate the opening and closing of stomata. Photosynthesis and, in turn, transpiration, would not occur which is necessary to maintain a continuous flow of water upwards from the roots to the leaves.Guard cells allow carbon dioxide to enter and exit the plant. Stomata regulate the opening and closing of guard cells. Transpiration and in turn, photosynthesis would not occur which is necessary to maintain a continuous flow of water upwards from the roots to the leaves.Stomata allow oxygen to enter and exit the plant. Guard cells regulate the opening and closing of stomata. If the cells didn’t function, photosynthesis would continue but transpiration would cease, which would interfere with the necessary continuous flow of water upward from roots to leaves.Guard cells allow carbon dioxide to enter and exit the plant. Stomata regulate the opening and closing of guard cells. If the cells didn’t function, photosynthesis and transpiration would cease, which would interfere with the necessary continuous flow of water upward from roots to leaves.

A plant wilted but later recovered. The stoma represents cells of the plant during recovery. As the plant recovered, the rate of photosynthesis increased becauseAthe stomatal pore opened, allowing carbon dioxide to enter the leaf.Bthe wilting prevented the entry of water into the leaves.Cchlorophyll within the leaf now had access to O2 gas.Dthe temperature of the leaf was reduced.