<span>Scientists believe that tectonic activity is not occurring on the moon. This is <span>because the moon lacks radioactive decay. The moon is not constantly supplied heat and energy from decaying unstable isotopes like Earth. Also, Earth is heated by the original heat during its formation. Since the moon was most likely broken off from earth, it lacks this central heat. @Kb0812 Hope this helps and if your feeling generous feel free to leave a rate, thanks and brainliest because it would really help me reach expert and I would appreciate it ;)</span></span>
B) Embryonic stem cells research requires the use of human embryos.
The correct option is C, ROUND WORM is a pseudoceolomate. Pseudoceolomate have a body cavity surrounding the gut but the gut itself is not surrounded by mesoderm; generally, their body cavity are lined by mesoderm derived tissue on one side and endoderm derived tissue on the other side. Other examples of pseudoceolomate are hook worm, hair worm, rotifers and pinworm. They are mostly parasitic in nature.
Answer:
Both bacteria and blue algae are prokaryote organisms, meaning that they do not have a differentiated nucleus, and therefore they are more primitive. But blue algae are able to perform photosynthesis and so we can believe that the first forms of life on Earth date even further back than 3 and a half billion years ago.
Explanation:
