Effective collisions are those that result in a chemical reaction. In order to produce an effective collision, reactant particles must possess some minimum amount of energy. This energy, used to initiate the reaction, is called the activation energy.
First second and third trimesters and then going into labor
Answer:
Resonance structure are the combination of the two lewis structure which together describes the electronic bonding i.e. a fractional bond and a fractional charge.
Explanation:
Resonance structure are the combination of the two lewis structure which together describes the electronic bonding i.e. a fractional bond and a fractional charge. They are often used to show the lone pairs or even the double bonds on atoms. When there are different ways of drawing lewis structure the resonance structure arises so as to satisfy the octet rule. Again there is resonance effect which descries the polarity that has been generated through the interaction between the molecules of lone pair and pi bond.
Answer:
secrete cytotoxic substance which triggers apoptosis of target cell.
Explanation:
Cytotoxic T cells have cell surface receptor which recognizes the antigen present on the receptor of target cell. This interaction initiates the process of killing of target cell.
After interaction cytotoxic t cell release cytotoxic substance called granzyme and perforin. Granzyme triggers apoptosis through the activation of caspases or by making the release of cytochrome c and activation of the apoptosome.
Perforin make pores in the cell and its action is similar to complement membrane attack complex. Therefore cytotoxic substances are released by Tc cells which trigger apoptosis of target cell.
Answer:
The passage of genetic instructions from one generation to another
Explanation: