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Plants grow from areas of cells called meristem, which are the only places on the plant where new cells can be made.
On some kinds of plants, the meristem is arranged so that when the tip of a root - which contains the root apical meristem, from which new growth is initiated. If it is cut off, new roots are signaled to start growing from the side, an area called the lateral meristem. These kinds of plants don’t die if the tip is cut off - instead they grow new adventitious roots.
Roots of plants keeps on growing even after the evacuation of their tips it is on the grounds that the roots have meristematic cells which have the ability to grow. Meristematic cells are the totipotent cells which have the ability to form any kind of plant cell. These cells experience continuous division and create the new tip.
As auxin (plant growth hormone) is also available in tips of roots. When we cut it at that point no more extension will happen. Auxin here will induce now lateral growth of roots; just sidelong growth happens which will increment in flat development this procedure is utilized by gardeners.
The correct option is A.
When an end of a tuning fork that is vibrating is placed against a table, it produces a sounder that is dramatically louder than the original sound produced by the vibrating tuning fork. At this stage, the tuning fork is forcing the table to vibrate at its own frequency. Thus, the statement in option A is not true.
The answer is primary producers
Answer:
There are three modes of heat transfer.
1. Conduction
2. Convection
3. Radiation
1. Conduction: Heat transfer through the process of conduction occurs in substances which are in direct contact with each other. It generally takes place in solids.
For example: When frying vegetables in a pan. Heat transfer takes place from flame to the pan and then to the vegetables.
2. Convection: In this process, heat is transferred in the liquid and gases from a region of higher temperature to a region of lower temperature. Convection heat transfer occurs partly due to the actual movement of molecules or due to the mass transfer.
For example: Heating of milk in a pan.
3. Radiation : It is the process in which heat is transferred from one body to another body without involving the molecules of the medium. Radiation heat transfer does not depend on the medium.
For example: In a microwave, the substances are heated directly without any heating medium.
Evolution is the change in the traits of organisms over several generations that relies on natural selection, being the A. how modern organisms descended from older organisms the best option for a definition of evolution in the alternatives.