Answer: C) a tube of cartilage (surrounding the notochord) with dorsal projections on both sides of the spinal cord.
Explanation:
The hagfish has a skeleton which do not consists of bones instead it consists of cartilage. The cartilage forms the part of the tentacles, tongue, nasopharyngeal duct, and soft palate. The tube of cartilage forms the surrounding of the notochord. It also has an attach with the dorsal projections on both sides of the spinal cord.
Answer:
Sweating and Dilation of skin blood vessels.
Explanation:
Homeostasis may be defined as the phenomena by which living organisms maintain their internal body environment. Exothermic animals spends energy for the maintenance of homeostasis.
The humans maintain their internal body temperature irrespective of their external environment. In case of excess temperature in summer, humans maintain their internal temperature by perspiration known as sweating and dilation of the blood vessels.
Thus, the correct answer is option (D).
I want to say D based on the my research
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