Yes, these are considered organs. The skin and the bones both fall under the definition of an organ.
True deforestation causes rainforests around the amazon to dry up
The answer is Neolithic or the New Stone Age. The Neolithic period is known for the spread of agriculture, used of stone tools and also the time where the cereal cultivation for agriculture and animal domestication were introduce and lastly the appearance of pottery is also known as a symbol during this time.
Homologous
The fins of fishes and flipper of a whale are homologous structures since they have different structure but similar structure
