You will also like...
Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..
Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..
Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..
Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..