The answer is <span>D) myofibrils
And the myofibrils are composed of sarcomeres
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they were classified as echinoderms and not as a new phylum because they have the attribute of the echinoderm where they were seen as the sea stars without arms, they live in the deep ocean.
<h3>What is an
echinoderms?</h3>
An echinoderm can be described as the any member that can be attributed to the phylum Echinodermata.
The members of this family can be seen as one that posses a recognisable radial symmetry which help in the process of their classification, and some of the members that fall into this caetegories are:
- starfish
- brittle stars
- sea urchins
- sand dollars
- sea cucumbers
- "stone lilies
It should be noted that the phylum can be seen as the level of classification or taxonomic rank that can be seen below kingdom.
In conclusion, the Sea Daisies which was thenew class of echinoderm that was discovered in 1986 can be classified as the echinoderm and not as phylum since they have the feautures of the echinoderm.
Read more about phylum at:
brainly.com/question/586233
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Answer: Monera is a kingdom that contains unicellular organisms with a prokaryotic cell organization, such as bacteria. They are single-celled organisms with no true nuclear membrane. The taxon Monera was first proposed as a phylum by Ernst Haeckel in 1866
Explanation: just look it all up on google or other websites