Assetion : There are different types of wood on the basisi of their comp[osition and time of production
Reason: The wood is actually a secondary xylem.

How does secondary xylem or wood form?

What are the types of secondary wood in gymnosperms?

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Secondary xylem formed during spring is called spring wood and secondary xylem formed in autumn is called autum wood. Reason. Spring wood and autumn wood is easily demarcated and leads to the formation of annual rings.

Show diagramatically two different arrangements used for winding the primary and secondary coils in a transformer. Assuming the transformer to be an ideal one write expressions fo rthe ratio of its output current to input current in terms of the number of turns in the primary and secondary coils. Mention two reasons for energy losses in an actual transformer.

Assertion: Ass succession proceeds the number and types of animals and decomposers change. Reason: At any time during primary or secondary succession , natural or human induced disturbances (fire/deforestation ) can convert a particular seral stage of succession to an earlier stage.