Callus formation is always necessary for adventitious root formation.

The two types of cell divisions that take place in the layers of a meristem are termed anticlinal and mericlinal. 

What happens when leaf blade cuttings are taken from a variegated Sansevieria, which is a periclinal chimera?

Stripping the leaves from cuttings always improves rooting success across all plant species.

Cuttings of succulent plants, like regular cuttings, generally require mist for rooting.

Which of the following systems works by lowering leaf temperature to reduce vapor pressure and slow water loss?

Anticlinal divisions lay down cells perpendicular to the cell layer, while periclinal divisions lay down cells parallel to the cell layer.

Cabernet Sauvignon and Thompson Seedless grapes are clones (though the cultivar names are recent) and have been grown for how long?

If dedifferentiation of cells is required for rooting, it can be seen microscopically even before any cell division or subsequent development has occurred.

Softwood cuttings are made from the most mature, lignified parts of the plant.