Despite their seemingly simple anatomy and radial symmetry Sea urchins and sea star are a type of deuterostome, closely related to the chordates.
What are the characteristics of deuterostome?
Animals classified as deuterostomes share a common embryonic development.
The first opening during development known as the blastopore changes to the anus in deuterostomes while the mouth changes in protostomes.
They have a coelom, which forms as a result of enterocele (coelom from the digestive tract).
These creatures include the following,
- Chordata,
- Echinodermata,
- Hemichordata.
Hence the correct answer is Deuterostome.
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Nitrogen fixation<span>. </span>Nitrogen fixation<span> is a </span>process<span> by which </span>nitrogen<span> in the Earth's atmosphere is converted into ammonia (NH</span>3<span>) or other molecules available to living organisms. Atmospheric </span>nitrogen<span> or molecular dinitrogen (N</span>2<span>) is relatively inert: it does not easily react with other chemicals to form new compounds</span>
Answer:
Methane (CH 4), carbon monoxide, and black carbon are all present in the atmosphere
Explanation:
Filter feeders. over harvesting is occurring in the bay disease and habitat loss.