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.
<span>The macromolecules DNA and RNA are referred to as the the nucleic acids. They are the polynucletoides, and have the nucletoide repeating monomers of a ribose sugar, nitrogenous base pair, and phosphate group.</span>
Answer:
d
Explanation:
Carbohydrates is bassically sugar
Answer - It defines how much a cell can do metabolic exchange and chemical substance exchange.
Reasoning - A Cell that is large has the ability of inadequate to provide the cell its nutrients and metabolic needs for the exchange in chemical substances.
Whereas a small cell does not take up space and can exchange quicker with chemical substance and nutrients because of its size to the surface area.