Which of the following is NOT a plant hormone? MCQ with Answer and Explanation

Explanation:
Glycolysis, occurring in the cytoplasm, breaks down one molecule of glucose (6C) into two molecules of pyruvate (3C), producing a net gain of 2 ATP and 2 NADH. This is the first step of both aerobic and anaerobic respiration. Pyruvate then enters the mitochondria for further oxidation in the Krebs cycle if oxygen is available.

Explanation:
The natural greenhouse effect keeps Earth warm enough for life; its enhancement causes global warming. Statement 3 is incorrect. 1 and 2 are correct.

Explanation:
The 'ozone hole' is a severe, seasonal thinning of the stratospheric ozone layer that occurs most prominently over the Antarctic region during the Southern Hemisphere's spring (September to November). This is due to the unique meteorological conditions in the Antarctic stratosphere, including the formation of Polar Stratospheric Clouds (PSCs) during the dark, cold winter, which provide surfaces for chemical reactions that release active chlorine from CFCs, rapidly destroying ozone when sunlight returns.