True or False
`C_3` plants are more efficient than `C_4` plants due to absence of photo-respiration.

The C_4 plants are photosynthesis more efficient than C_3 plants becxause:

True or False plants moderate the temperature.

Name any two C_4 plants.

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:Photosynthetically C_4 plants are less efficient thna C_3 plants. REason:The operation of C_4 pathway requires the involvement of only bundle sheath cells.

Explain gymnosperm plants are more advanced than fern plants.

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion: C_4 photosynthetic pathay is more efficient thant he C_3 pathway. Reason:Photorespiration is suppressed in C_4 plants.

True of False : CH_3CH_2I is more reactive than CH_3CH_2Cl towards KCN.

True of False : CH_3CH=CHCl is more reactive than ClCH_2CH=CH_2 .