Table of Contents
What is callus example?
In living plants, callus cells are those cells that cover a plant wound. In biological research and biotechnology callus formation is induced from plant tissue samples (explants) after surface sterilization and plating onto tissue culture medium in vitro (in a closed culture vessel such as a Petri dish).
What does callous mean in a sentence?
adjective. cal·lous | \ ˈka-ləs \ Essential Meaning of callous. disapproving : not feeling or showing any concern about the problems or suffering of other people a selfish and callous young man a callous refusal to help the poor a very callous remark.
What does Collused mean?
1. Having calluses; toughened: callous skin on the elbow. 2. Emotionally hardened; unfeeling: a callous indifference to the suffering of others.
What is callus Class 12?
Complete answer: Callus is the unorganized and actively dividing the mass of cells that are maintained in tissue culture.
How do you get feet calluses?
Corns and calluses develop from repeated friction, rubbing or irritation and pressure on the skin. Corns and calluses typically form on the bony or prominent areas of feet. On the hands, they (more likely calluses) form on the areas where there is ongoing rubbing against the skin.
What is callus in 10th class?
A callus is a growing mass of unorganized plant parenchyma cells. The callus is an undifferentiated mass of tissue. It is mainly used in plant tissue culture.
Which is an example of a callous sentence?
callous Sentence Examples. Kiera looked at Evelyn, astonished by her callous words. That was a particularly callous act, which left her left hand painful and badly bruised. Stealing the coats was a callous act.
What is the meaning of the word callus?
A callus is a hard, thickened area of skin that develops usually from friction or irritation over time. Such a hardened area often leaves one less sensitive to the touch, so it’s no surprise that the adjective callous, in addition to describing skin that is hard and thick, can also be used as a synonym for “harsh” or “insensitive.”
How long does it take for a callus to form?
In the course of time, the callus is smoothed off and eventually the bone returns to its normal thickness. It normally takes one to two weeks for a callus to form, then about six weeks for the bone fragments to unite. When a patch of bark is removed from a tree the wound is healed by the formation of a callus which differentiates into periderm.
Can a callus be a synonym for insensitive?
A callus is a hard, thickened area of skin that develops usually from friction or irritation over time. Such a hardened area often leaves one less sensitive to the touch, so it’s no surprise that the adjective callous, in addition to describing skin that is hard and thick, can also be used as a synonym for “harsh” or “insensitive.”.