Class-XI

OPEN TEXT-BASED ASSESSMENT

OTBA

1.

2. The Ambient Air 12

Take Care! 1Themes:

Shiksha Kendra, 2, Community Centre, Preet Vihar, Delhi-110301, India

CENTRAL BOARD OF SECONDARY EDUCATION

2015-16

Biology

Page

Shiksha Kendra, 2, Community Centre, Preet Vihar, Delhi-110301, IndiaTel: 011-22509256-59 Website: www.cbse.nic.in

CENTRAL BOARD OF SECONDARY EDUCATION