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Question

What's Imbibition, radicle, plumule, cotyledons? and legumes witness examples. Is tomata a legume?

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Solution

Imbibition is a special type of diffusion when water is absorbed by solids colloids causing an enormous increase in volume. Examples include the absorption of water by seeds and dry wood. If it were not for the pressure due to imbibition, seedlings would not have been able to emerge out of soil into the open; they probably would not have been able to establish.

Imbibition is also diffusion since water surface potential movement is along a concentration gradient; the seeds and other such materials have almost no water hence they absorb water easily. Water potential gradient between the absorbent and the liquid imbibed is essential for imbibition. In addition, for any substance to imbibe any liquid, affinity between the adsorbant and the liquid is also a pre-requesite.
example:example of imbibition is in the Amott test.
Radicle is the first part of a seedling (a growing plant embryo) to emerge from the seed during the process of germination. The radicle is the embryonic root of the plant, and grows downward in the soil (the shoot emerges from the plumule)

plumule
1. (Botany) the embryonic shoot of seed-bearing plants
2. (Zoology) a down feather of young birds that persists in some adults A cotyledon "seed leaf" from Latincotyledon, from Greek: is a significant part of the embryo within the seed of a plant, and is defined by the Oxford English Dictionary as "The primary leaf in the embryo of the higher plants (Phanerogams); the seed-leaf." Upon germination, the cotyledon may become the embryonic first leaves of a seedling. The number of cotyledons present is one characteristic used by botanists to classify the flowering plants (angiosperms). Species with one cotyledon are called monoctyledonous ("monocots"). Plants with two embryonic leaves are termed dicotyledonous ("dicots") and placed in the class Magnoliopsida.Examples of dicots are pea, gram, soybean etc. and of monocots are - wheat, barley, paddy and maize etc.
A legume is a plant or its fruit or seed in the family fabacae (or Leguminosae). Legumes are grown agriculturally, primarily for their grain seed called pulse, for livestock forage and silage, and as soil-enhancing green manure. Well-known legumes include alfalfa, clover, peas, beans, chickpeas, lentis, lupin bean, mesquite, carbo, soybeans, peanutsand tamarind.

No. Tomatoes are actually fruits, and they grow as fruits, not in pods. All legume crops have the seeds grow in a pod, not in a soft, fleshy fruit similar to an apple or orange.

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