somebody help. . ways of propagation of plant materials for planting.​

These seven methods include: seed propagation, cutting, layering, division, grafting, budding, and tissue culture technique.

Explanation:

The major methods of asexual propagation are cuttings, layering, division, budding and grafting. Cuttings involve rooting a severed piece of the parent plant; layering involves rooting a part of the parent and then severing it; and budding and grafting is joining two plant parts from different varieties.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation: