Elephant is an inhabitant of hot climate. This is suggested by-

Correct Answer: D

Rationale: The correct answer is D: Almost hairless skin. Elephants living in hot climates need to regulate their body temperature efficiently. Having almost hairless skin helps them dissipate heat effectively through their skin. This adaptation is crucial for elephants to thrive in hot environments. A: Its huge size is not a direct indicator of its ability to survive in a hot climate. B: Small eye size is not necessarily related to their adaptation to hot climates. C: Fleshy feet do not specifically indicate their preference for hot climates.

Correct Answer: C

Rationale: The correct order for the stages in skin regeneration following an injury is: 1) Blood clot/scab formation, 2) Epidermis covers granulation tissue, 3) Epidermis covers scar tissue, and 4) Calcium injection. Rationale: 1) Blood clot/scab formation occurs first to stop bleeding and prevent infection. 2) Epidermis covering granulation tissue signifies the growth of new tissue. 3) Epidermis covering scar tissue indicates the completion of tissue repair. 4) Calcium injection is not a typical stage in skin regeneration; it does not play a direct role in the natural healing process. Summary: Choice A is incorrect as it starts with covering scar tissue, which is a later stage. Choice B is incorrect as it introduces calcium injection, which is not a standard stage. Choice D is incorrect as it places calcium injection before blood clot formation, which is inaccurate.

Correct Answer: B

Rationale: The correct answer is B: Keratin. Keratin is a structural protein found in the skin that forms a protective barrier to reduce water loss. It is abundant in the outermost layer of the skin, the epidermis, helping to prevent dehydration. A: Keratin is the same as the correct answer, so it is not the correct choice. C: Melanin is a pigment that gives color to the skin and provides some protection against UV radiation, but it does not directly reduce water loss. D: Eleidin is a precursor to keratin in the skin, but it is not the protein responsible for reducing water loss.

Correct Answer: B

Rationale: The correct answer is B: desmosomes. Desmosomes are specialized cell junctions that firmly attach keratinocytes together in the epidermis. Desmosomes provide mechanical strength and stability to the epidermis by forming strong connections between adjacent cells. Elastic fibers (choice A) provide elasticity to tissues but are not involved in cell-to-cell connections. Keratin (choice C) is a fibrous protein that forms the structural basis of keratinocytes but does not directly connect them. Prekeratin (choice D) is a precursor to keratin and is not involved in cell-cell adhesion.

Correct Answer: A

Rationale: Rationale: A: Scalp hairs do not grow constantly; they have a growth cycle with periods of growth and rest. B: The cortex of the hair is indeed composed of hard keratin, providing strength and structure. C: Terminal hairs are indeed heavier and more pigmented than vellus or intermediate hairs. D: Club hair is indeed hair that has stopped growing and is in the resting phase. Therefore, the correct answer is A as it is the only statement that is not entirely accurate.