HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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photosynthesis only occurs in the spongy mesophyll near the bottom of the leaf.
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stomata are closer to vascular bundles that bring water into the leaf.
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gravity plays a role in gas exchange.
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water loss would be less on the shaded lower surface than in direct sun.
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Detailed explanation-1: -Stomata are more numerous on the lower side of the leaf to prevent transpiration. Transpiration is the loss of water through stomata, so, more stomata are found on the lower surface to prevent excessive loss of water.
Detailed explanation-2: -Leaves with stomata only on the lower side are known as hypostomatous leaves. This arrangement of stomata allows dicot leaves to conserve water. Dicot leaves (and a small number of atypical, “net-veined” monocot leaves) have two different types of mesophyll: palisade mesophyll and spongy mesophyll.
Detailed explanation-3: -The more number of stomata present at the lower surface of the dicot leaves than the upper surface of the leaves to prevent excess water loss.
Detailed explanation-4: -Stomata are tiny pores present on the epidermis of a leaf that help in the exchange of gases and transpiration. Generally lower surface of the leaf has more number of stomata, especially in dicotyledons. But monocotyledons usually have an equal number of stomata and both upper and lower surfaces.
Detailed explanation-5: -the upper part of leaf have fewer stomata because on the upper part they are more exposed to sunlight and wind. There are many stomata at the lower part because it reduces the rate of evaporation as their is no much sunlight reaching their.