Question

Select the Taxon mentioned that represents both marine and freshwater species

• A. Ctenophora
• B. Cephalochordata
• C. Cnidaria
• D. Echinoderms

Answer 1

The Correct Option is C

To determine which taxon contains species that inhabit both marine and freshwater environments, we need to consider the characteristics and habitat preferences of the given options:

1. Ctenophora: Also known as comb jellies, these are predominantly marine organisms found in various oceanic environments but are not typically known to inhabit freshwater.
2. Cephalochordata: This subphylum includes lancelets, which are entirely marine organisms and do not occur in freshwater environments.
3. Cnidaria: This phylum includes jellyfish, corals, sea anemones, and hydras. Cnidarians are known to inhabit both marine and freshwater environments. Notably, some members like hydras are found in freshwater habitats, while others are predominantly marine.
4. Echinoderms: Comprising sea stars, sea cucumbers, and sea urchins, echinoderms are exclusively marine and are not found in freshwater.

From the above analysis, it is clear that Cnidaria is the taxon that includes species inhabiting both marine and freshwater environments.

Conclusion: Therefore, the correct answer is Cnidaria.