Assertion : Dragonflies can be used to decrease occurrentce of diseases like malaria, dengue, etc.
Reason : Baculoviruses are effective in controlling may insects and other arthropods.

Assertion : Dragonflies can be used to decrease occurrence of diseases like malaria, dengue, etc. Reason : Baculoviruses are effective in controlling may insects and other arthropods.

Assertion : Dragonflies can be used to decrease occurrence of diseases like malaria, dengue, etc. Reason : Baculoviruses are effective in controlling may insects and other arthropods.

Assertion : Dragonflies can be used to decrease occurrence of diseases like malaria, dengue, etc. Reason : Baculoviruses are effective in controlling may insects and other arthropods.

Assertion : Dragonflies can be used to decrease occurrence of diseases like malaria, dengue, etc. Reason : Baculoviruses are effective in controlling many insects and other arthropods.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : A transformer can be used to increase/ decrease both voltage and the current. Reason : In a transformer, e_p I_p = e_sI_s and accordingly, if we gain in voltage, we lose in current and vice-versa.

Assertion : Magnification power of microscopes can be decreeased by increasing the focal length of the lens used. Reason : Due to constructional limitations , the focal length of lens cannot be decreased beyond certain unit.

Assertion: A cadmium is used for making control rods in nuclear reactors. Reason: Cadmium is very effective in slowing down the speed of neutrons.

Read the following five statements (A to E) and select the option with all correct statements: The greater the BOD of waste water, more is its polluting potential. (B). Statins produced by the yeast Trichoderma polysporum act as blood -cholesterol lowering agents. (C) Baculoviruses are pathohens that attack insects and other arthropods. (D) The majority of baculoviruses used as biological control agents are in the genus Nucleopolyhedrovirus. (E) Treatment of waste water is done by the autotrophic microbes naturally present in the sewage.

Assertion : NAND is a universal gate. Reason : It can be used to describe all other logic gates.