The condition caused by excessive secretion of thyroxine is: MCQ with Answer and Explanation

Explanation:
Pancreatic juice contains inactive enzymes like trypsinogen, chymotrypsinogen, and procarboxypeptidase. When trypsinogen enters the small intestine, it is activated into trypsin by the enzyme enterokinase (secreted by the intestinal mucosa). Trypsin then digests proteins into smaller peptides. Pancreatic amylase digests carbohydrates, and lipase digests fats.

Explanation:
Primary succession begins on lifeless, barren substrates like bare rock, where no soil exists initially. Secondary succession occurs in areas where an existing community has been destroyed by disturbances like forest fires, floods, or logging, but soil remains. A climax community is the final, stable, and self-perpetuating stage of ecological succession, in equilibrium with the environment. Thus, statements 1 and 2 are correct.

Explanation:
Alcoholic fermentation in yeast produces ethanol and CO₂. Fermentation is anaerobic, yields 2 ATP, and in muscles produces lactic acid.