A new era in the development of biology was marked by an invention at the end of the 16th century. a microscope. Already in the middle of the XVII century. a cell was discovered, and later a world of microscopic creatures – protozoa and bacteria – was discovered, the development of insects and the basic structure of spermatozoa were studied. In the XVIII century. Swedish naturalist Karl Linney (1707-1778) proposed a classification system for wildlife and introduced a binary (double) nomenclature for naming species. Karl Ernst Baer (Karl Maksimovich Baer) (1792-1876), professor of the St. Petersburg Medical and Surgical Academy, studying intrauterine development, found that the embryos of all animals in the early stages of development are similar, formulated the law of embryonic similarity and entered the history of science as the founder of embryology. The first biologist who tried to create a coherent and holistic theory of the evolution of the living world was the French scientist Jean Baptiste Lamarck (1774-1829). Paleontology, the science of fossil animals and plants, was created by the French zoologist Georges Cuvier (1769-1832). The cellular theory of the zoologist Theodor Schwann (1810–1882) and the botanist Matthias Jakob Schleiden (1804–1881) played a huge role in understanding the unity of the organic world.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.