Simple strokes of horse pictures
horse(mǎ) Herbivores. Tamed by humans 4,000 years ago. Przewalskis horse (66 chromosomes) and domestic horse (64 chromosomes) can cross to produce fertile offspring. Horses were the main driving force for agricultural production, transportation, and military activities in ancient times. There are about 200 horse breeds in the world. With the development of productivity, improvement of scientific and technological level, and the invention and widespread application of power machinery, horses play an increasingly smaller role in real life. Horses are mainly used for equestrian sports and milk production, and the number of horses is greatly reduced. However, in some developing countries and regions, horses are still mainly used for draft purposes and are an important source of draft power. The horses staple food is grass.
