millions of species inhabit earth

Millions of species inhabit Earth. How do scientists make sense of them all? First, scientists study the similarities and differences between organisms. The scientists study characteristics including obvious physical traits, such as hair or leaves, and molecular traits, such as DNA sequences. Then, scientists use the information to classify species into meaningful groups. The groups may also reveal which species are related and how they fit along the evolutionary tree. Scientists who specialize in the naming and classifying of species are called taxonomists. In this activity, you will act as a taxonomist and identify and classify an unusual organism.

Some things are easy to classify. If you saw a mountain lion in the wild, you could probably guess that it was somehow related to other types of cats—even housecats. You might also know that it was a mammal, and of course you would know that it’s an animal.
But the classification of some living things is much tougher. In the ocean, living things called sea cucumbers inch along the bottom. They can be about a foot long, and some are transparent, whereas others are brightly colored. But what are they? How are they classified? Are they plants, animals, or something else entirely? Who are their relatives? In this activity, you’ll find out.

1. Part of a taxonomist’s job is to record detailed descriptions of the organisms they study. How would you describe the sea cucumber?
Verry radical chages in appearence from one species to an other species of sea cucumbers. the have a respiratory tree, unique for sea cucumbers. soft to touch even some of them semm to have spines, which are also soft. live in both deep and shallow waters, some get exposed to the air at low tides and still live.

2. How is the sea cucumber classified? Are all sea cucumbers one species? they are classified as: Domain, eukariotic; Kingdom, animalia; phylium, echinodermata; class, Holothuroidea. no.

3. What species are closely related