Answer: Sea stars move using a water vascular system. Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals.
Explanation: The radial canals carry water to the ampullae and provide suction to the tube feet.
Answer:
The populations are isolated and thus do not interbreed.
Explanation:
Answer:
Tunica
Explanation:
The cell layer which is common to all blood vessels regardless of their size is known as Tunica. These layers usually lines the layers of the connective tissues of the body such as the artery, vein and capillary.
The Tunica is divided into three parts known as Tunica intima, Tunica media and Tunica adventitia. They usually vary in size according to the blood vessels I’m which they are found in which depicts different and specialized function.
Answer:
The correct answer is option D, that is, waves increase oxygen availability in the ocean increasing abundance.
Explanation:
The conduction of energy from the wind to the water environment takes place with the help of waves. It plays a prime function in the survival of life in the oceans. The prime function of waves is to clean the surface and assists in oxygenating the water present below the surface. The waves also facilitate in carrying nutrients along the shorelines for the marine species.