Formation of leather from the skin is called

Correct Answer: B

Rationale: The correct answer is B: Tanning. Tanning is the process of converting raw animal hides into leather by treating them with chemicals to preserve and strengthen the material. Taxidermy is the preserving of animal bodies, not the formation of leather. Keratinization is the process of converting soft tissues into hard structures like hair and nails, not the formation of leather. So, tanning is the only choice directly related to the formation of leather from the skin.

Correct Answer: D

Rationale: The correct answer is D: Acting as a receptor organ. Mammalian skin contains sensory receptors for touch, pressure, pain, temperature, and vibration. These receptors play a crucial role in detecting and responding to external stimuli, aiding in survival. Skin is not primarily meant for A: The removal of excess water, as this function is mainly carried out by the kidneys. Skin does not excrete urea, making B incorrect. Skin is not responsible for storage of food, making C an incorrect choice. Thus, the correct answer is D as skin primarily acts as a receptor organ for sensory perception.

Correct Answer: B

Rationale: The correct answer is B: Colostrum. Colostrum is the first milk produced by the mammary glands following childbirth. It is rich in antibodies, proteins, and nutrients, essential for the newborn's immune system and overall development. It is crucial for providing protection and nourishment to the newborn. Incorrect choices: A: Infant milk - Incorrect, as the milk produced immediately after childbirth is colostrum, not infant milk. C: Casein - Incorrect, as casein is a protein found in milk but not specifically related to the first milk produced after childbirth. D: None of these - Incorrect, as colostrum is the correct term for the first milk secreted after childbirth.

Correct Answer: B

Rationale: The correct answer is B: Dermatology. Dermatology is the branch of medicine that deals with the study of skin and its diseases. "Hypology" (Choice A) is not a recognized term related to skin study. "Tricology" (Choice C) is the study of hair and scalp, not skin. "Mastology" (Choice D) is the study of breast diseases, not skin. Therefore, the correct term for the study of skin is Dermatology.

Correct Answer: B

Rationale: The correct answer is B: Perineal glands. Rabbits produce a highly odorous and characteristic smell through their perineal glands. These glands are located near the anus and secrete a substance that helps rabbits communicate through scent marking. A: Tarsal glands are located on the legs of deer and are not related to rabbits' distinctive smell. C: Zeis glands are associated with eyelashes and are not responsible for the odor produced by rabbits. D: "None of these" is incorrect as perineal glands are indeed responsible for the odor in rabbits. In summary, the perineal glands in rabbits secrete a substance that gives them their unique smell, making choice B the correct answer.