Which of the following combinations correctly matches a phylum to its description?

a. echinodermata - bilateral symmetry as a larva, water vascular system
b. nematoda - segmented worms, closed circulatory
c. cnidaria - flatworms, gastrovascular cavity, acoelomate
d. platyhelminthes - radial symmetry, polyp and medusa body forms

The answer is B

The phylum Nematoda (roundworms) is one of the most common phyla.

There more than 15,000 known species of roundworms, however, there are many thousands of individual varieties nematodes, as well.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.