CBSE Board Biology Papers

BIOLOGY PAPER 1 ANSWERED (CBSE 10+2 BOARD EXAMINATION) SECTION – A 1. Give two functions of lenticels i.   Gaseous exchange ii.  Transpiration 2. Give full name of ACTH A.    Adreno Cortico Trophic Hormone Q. 3. Name the chemical released by WBCs which causes rise in temperature of the human body when infected. Ans. Pyrogens Q.4. Who signals the closure of stomata in certain plants during...