Breed is a broad concept. Breed means everything belonging to a particular genus, species, both living and non-living.
What is meant by this
Breed is the designation of many living and nonliving organisms. It can be distinguished:
- Animals that vary in habitat or other property. For example, a breed of animal that can only live in the north or in the south. It can be bred by humans (dog breeds, cats, etc.). The breed has all the animals living in the forest, in the steppes, on homesteads.
- Plants. Most often, trees are indicated, for example, conifers.
- Minerals, mining materials.
- Sometimes the word "breed" refers to people, their race, origin.
Breeds may refer to soft or hard material, such as wood.
Wood
Hard rock is a collection of different types of materials that are determined by various methods. The Brinell method is most often used to identify wood hardness . It involves measuring the depth of depression in the wood. To do this, a metal ball is pressed under load. Then it is removed and the depth of the remaining trace is measured in units of hardness (HB).
Hardness is sometimes measured using the Rockwell method. The measurement principle is similar to the previous one, but the units in this case are different - HRC or HRA, HRB.
Based on the results of the research, the division of tree species by hardness was compiled. In the first place is a jatob with a hardness of 7 HB. In second place is sucupira, whose hardness is 5.6 HB.
All trees with a hardness of less than 4 HB are classified as soft.
Hard rocks
Hard rock is a solid body of natural origin, divided into three main groups: sedimentary, metamorphic and igneous.
The most common material of magmatic origin is granite. It is widely used in construction.
In the upper crust are sedimentary rocks. They are the result of the vital activity of organisms or the destruction of other breeds. Sedimentary rock is a few subspecies that includes clastic, chemical, and organic types.
Metamorphic are most often represented by slate, marble and quartz. These materials are formed under the influence of high temperatures and high pressure.
Animals
Animal breeds are numerous groups of representatives of the same species, with one history of development. Typically, a breed has certain properties that are inherited and embedded in genes. Moreover, it is important that the descendants and parents have the same features, physique, colors. When crossing different breeds, hybrids or mestizos are obtained.
For the breeding of a new breed, they have been doing tremendous work for decades. As a result, several generations of animals are obtained in which identical external characters are revealed, and character traits are laid at the genetic level.
As soon as livestock farmers achieve the desired result (several generations have the same, unchanging traits), this is called breed standards. Purebred offspring of such animals is obtained in such an amount that it is possible to maintain the purity of the breed. After achieving the desired result, the breed is registered by tying it to a specific country.
Plants
New breeds of conifers are also being bred. They are obtained by crossing various varieties, species of pines, thuja, junipers. As a result, breeders manage to obtain resistant plants with unusual properties. For example, dwarf pines, conifers that can tolerate severe frosts, conifers with an unusual color of cones, needles.
Any breed is the result of work that has been carried out for a long time. And it doesn’t matter if it was created by nature or by man.