The answer to this question is option B. Hope this helps
Answer: The reason why stem cell research is a big field in biology or even the world is because stem cells might be able to treat degenerative conditions as well as answering questions about human development.
Answer:
The correct answer is "a well-developed notochord".
Explanation:
The missing options for this question are:
A) paired fins
B) jaws
C) a well-developed notochord
D) a rasping tongue
The correct answer is option C) "a well-developed notochord".
Lampreys and hagfishes are two species of jawless fish that are uncommon to see, but they have more than 30 different species for each one of them. Both lampreys and hagfishes have a well-developed notochord, during their larvae and adult forms. The notochord provides support to their body as it has the function of a cartilaginous skeleton.
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a. radioactive isotopes. They use radioactive Phosphorus-32 as labels on a phage (bacteriophage) DNA that infects E. coli. Their experiment showed that the radioactive isotopes were only seen in E.coli and not in the phage.</span>
It uses nephridium as the expiratory organ for flat worms
