Answer: Carbon is the basis for the organic molecules that constitute life because it can form multiple strong bonds with itself and with other elements.
Explanation:
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.
Learn more about Deuterostome,
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Horses and zebras can be bred to produce a zorse, which is sterile. Which is most likely the reason zebras and horses are considered separate species?
The innermost membrane envoloping the embryo in the uterus is Endometrium.
Answer: The trophic levels of a food chain are the number of steps from the beginning of the chain.
Explanation:
A food web/chain starts with trophic level 1 (primary producers), trophic level 2 (herbivores), trophic level 3 (carnivores) and so on.
