Which of the following is NOT a type of plastid? MCQ with Answer and Explanation

Explanation:
The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of substances like CFCs. The Kyoto Protocol is an international agreement linked to the UNFCCC, committing state parties to reduce greenhouse gas emissions to combat global warming. The Ramsar Convention is the international treaty for the conservation and sustainable use of wetlands, recognizing their ecological importance. All statements are correct.

Explanation:
The pupil is the opening in the center of the iris whose size is adjusted by the iris muscles to control the amount of light entering the eye. The cornea and lens focus light, the retina senses it. In bright light, the pupil constricts; in dim light, it dilates.

Explanation:
Bacille Calmette-Guérin (BCG) is a live attenuated vaccine against tuberculosis. It is given at birth in many countries. Oral polio vaccine (OPV) for polio.