If a rabbit is deprived of its vibrissae (stiff long hair on the snout)

Correct Answer: A

Rationale: The correct answer is A because vibrissae, also known as whiskers, are essential for a rabbit's navigation and sensing its surroundings. Without whiskers, a rabbit may struggle to move freely and may become disoriented. Choice B is incorrect as speed is not solely determined by the presence of vibrissae. Choice C is incorrect as the rabbit may still attempt to move even without vibrissae. Choice D is incorrect as removing vibrissae will have an impact on the rabbit's mobility and spatial awareness.

Correct Answer: C

Rationale: The correct answer is C: Hippopotamus. Sudorific glands are sweat glands responsible for regulating body temperature. Hippopotamuses have sudorific glands confined to their external ears, which help them cool down. Deer and kangaroos do not have sudorific glands in their external ears. Choice D, "Acting as receptor organ," is vague and unrelated to the function of sudorific glands.

Correct Answer: D

Rationale: The long and hard hairs on a rabbit's upper lip, known as whiskers, serve multiple purposes. Firstly, they provide tactile stimulation by helping the rabbit sense its surroundings. Secondly, they aid in pressure stimulation, helping the rabbit navigate through tight spaces. Finally, they play a role in temperature stimulation by detecting changes in the environment. Therefore, the correct answer is D, "All of the above," as whiskers serve all these functions. Choices A, B, and C are incorrect because they each represent only one aspect of the whiskers' function, while the correct answer encompasses all of them.

Correct Answer: A

Rationale: The correct answer is A: Unstriped arrector pili muscles. These muscles are attached to the hair follicles in the dermis. They contract in response to stimuli like cold or fear, causing the hair to stand up (goosebumps). Choice B, "Goose flesh," is a sensory response caused by the contraction of arrector pili muscles, not the attachment itself. Choices C and D, Vibrissae and Panniculus adiposus, are not directly involved in the attachment of hair follicles in the dermis.

Correct Answer: C

Rationale: Rationale: Taxidermy involves preserving the whole skin (epidermis and dermis) using chemicals to maintain the lifelike appearance of an animal. Albinism is a genetic condition causing lack of pigmentation. Toxicology is the study of the adverse effects of chemicals on living organisms. Tanning is a process of treating animal hides to produce leather, not preserving the whole skin.