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What is biological magnification (biomagnification)? Explain its causes and effects on ecosystems and human health with suitable examples.

What is biological magnification (biomagnification)? Explain its causes and effects on living organisms with a suitable example. Why do top carnivores accumulate the maximum concentration of harmful chemicals?

Explain the mechanism of chemical coordination in animals with special emphasis on the endocrine system. Discuss the role of any four major endocrine glands and their respective hormones in maintaining physiological balance in the human body.

Discuss the endocrine system in human beings. Name any four major endocrine glands, their location in the body, the hormones they secrete, and the primary functions of those hormones.

Differentiate between the nervous system and the hormonal system in animals regarding the speed and duration of their control and coordination mechanisms.

Explain the role of the endocrine gland 'Thyroid' in the human body. What deficiency disease is caused by lack of iodine in diet?

Name the hormone responsible for the regulation of metabolism of carbohydrates, fats, and proteins in human beings, and state the disease caused by its deficiency.

Explain the term 'oxidation' in the context of chemical reactions.