Sclerenchyma cells function as plant support. Hardened with lignin, a tough subtance that strengthens the cell wall, these cells are thicker and less flexible than the collenchyma cells. The cells usually do not live after they are fully grown, but the non-living cell structure will remain as a source of strength. These cells are found in stems, leaf veins and in the hard outer covering of seeds and nuts.
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Sclerenchyma
The hard covering of seeds is primarily composed of the seed coat, which is made up of specialized tissues like the testa and the tegmen. These tissues provide protection to the seed during dormancy and help regulate water intake when germination occurs. Additionally, the endosperm or cotyledons found within the seed also contribute to the overall structure of the seed coat.
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Seeds have various tissues and structures that aid in their dispersal, including wings, parachutes, hooks, and hairs that allow for wind dispersal. Some seeds have fleshy structures that attract animals for dispersal through ingestion and subsequent excretion. Others have hard outer coatings that protect them during transport.
Pomegranate seeds can be hard due to the variety of the pomegranate, the ripeness of the fruit, or how it was stored.
No, an MRI is used to image soft tissues such as ligament and muscles. These do not show up on an X-ray which looks at hard tissues such as bone.
The seeds are like little disks, round and thin and somewhat hard, roughly the diameter of a boysenberry "polyp." They don't bother a lot of people, but others find them to be annoying.
Scarlet macaws mainly eat seeds, some seeds, including large and hard seeds.
Well, the seeds do have a hard shell, and there is an indentation around the seeds, sort of like a pocket.
Yes because it is hard
Well they are called pumpkin seeds not pumpkin nuts so theoretically the are seeds. Also this is serious they are seeds! :D