Question Video: Recalling the Positioning of 𝑀𝑖𝑚𝑜𝑠𝑎 Leaflets During the Day | Nagwa Question Video: Recalling the Positioning of 𝑀𝑖𝑚𝑜𝑠𝑎 Leaflets During the Day | Nagwa

Question Video: Recalling the Positioning of π‘€π‘–π‘šπ‘œπ‘ π‘Ž Leaflets During the Day Biology • Second Year of Secondary School

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Complete the following statement: During the day, π‘€π‘–π‘šπ‘œπ‘ π‘Ž leaflets are primarily held in οΌΏ position. [A] a vertical [B] an upward [C] a horizontal [D] a coiled

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Video Transcript

Complete the following statement. During the day, π‘€π‘–π‘šπ‘œπ‘ π‘Ž leaflets are primarily held in blank position. (A) A vertical, (B) an upward, (C) a horizontal, or (D) a coiled.

While all living organisms are interesting in their own way, π‘€π‘–π‘šπ‘œπ‘ π‘Ž π‘π‘’π‘‘π‘–π‘π‘Ž, also called the sensitive plant or the touch-me-not plant, is a unique and fascinating organism. The species name π‘π‘’π‘‘π‘–π‘π‘Ž comes from the Latin word meaning shy or shrinking.

In order to understand why, we first have to discuss some terms relating to the plant’s leaves. The leaves of a π‘€π‘–π‘šπ‘œπ‘ π‘Ž plant are called compound leaves. They are made up of a petiole and several distinct leaflets. Each leaflet is made up of a rachis to which photosynthetic pinnules are attached. During the daytime or in the absence of touch, the leaflets are held open in a horizontal position in order to capture as much sunlight as possible for photosynthesis.

The π‘€π‘–π‘šπ‘œπ‘ π‘Ž plant responds to stimuli like touch by rapidly folding up its leaflets and drooping its rachises and petioles within just a few seconds. The π‘€π‘–π‘šπ‘œπ‘ π‘Ž plant also exhibits the same reaction in response to a reduction in light intensity at the onset of night, when there is no light around to be captured for photosynthesis.

Now we can answer our question correctly. During the day, π‘€π‘–π‘šπ‘œπ‘ π‘Ž leaflets are primarily held in a horizontal position. So the correct answer is (C), a horizontal.

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