Which of the following organisms has a closed circulatory system?
a. sponges
b. cnidarians
c. nematodes
d. insects
e. vertebrates

The correct answer is E. Vertebrates have a closed circulatory system.

Explanation:

The main mission of the circulatory system is to deliver oxygen and nutrients to all body cells.

In the closed circulatory system, blood travels inside a network of blood vessels, without leaving them. The material transported by the blood reaches the tissues through diffusion. It is characteristic of all vertebrates, including humans.

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above