تمارين اونلاين Biology ||| Immunity in Plants

When the external layer of a plant stem is exposed to cut,…………

In herbaceous  stems, the epidermis  contributes in ……………..

The two following graphs represent some lines of immune defence in plant, where graph (1) represents some means of immunity before the infection of the plant by a microbe and graph (2) represents the plant after infection, study the two graphs,then answer

Symbol (A) may refer to………………..

The two following graphs represent some lines of immune defence in plant, where graph (1) represents some means of immunity before the infection of the plant by a microbe and graph (2) represents the plant after infection, study the two graphs,then answer

Symbol (B) may refer to ………………..

Symbol (C) may refer to……………….

The two following graphs represent some lines of immune defence in plant, where graph (1) represents some means of immunity before the infection of the plant by a microbe and graph (2) represents the plant after infection, study the two graphs,then answer

Symbol (D) may refer to ………………..

All the following substances may be found in healthy plants, except the……..

Which of the following stimulates the natural immunity in plant ?………..

From the defensive means of rats is…………..

The protection method that occurs as a result of the plant injection by some weak

microbes is the……………………

All the following have a waxy layer on their epidermis, except the…….

The most resistant cells to the infection with a microbe are the……………..

From the structural immunity means which are formed to prevent the entry of a microbe is…………………..

All the following are from the structural immunity  means that are formed to prevent the spreading of the microbe, except………………..

From the second line of defence in plant is the formation of…..……

All the following are found in some plants before being infected, except …………