Answer:
Mitochondria and Chloroplasts
Explanation:
Mitochondria and plastids (like chloroplast) each have their own DNA due to at one point being prokaryotes with their own DNA.
I am afraid there is no specific answer to your question becuase there is not only one fell good chemical, there are 4:
Endorphin, Serotonin, Oxytocin and Dopamine.
Hope it helped,
Happy homework/ study/ exam!
The gram is the basic unit of mass.
Answer:
Fossils of Ambulocetus
Explanation:
Fossils of Ambulocetus show that it was about 3 meters long. It had hind legs which were more suited for swimming than for walking. It could hear very well under water, and its teeth resembled those of modern cetaceans. Its limb anatomy suggests that it was slow on land and in the water.
