Do invertebrates have an endoskeleton or an exoskeleton?

exoskeleton

Explanation:

Well, not only are they all invertebrates, they all have exoskeletons, which are hard skeletons that are on the outside of their bodies. Humans and other vertebrates have endoskeletons, which are made from bones or cartilage, and are located within their bodies

the answer is b.) hydrogen bonds between bases.

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