Despite the fact that allocate global kingdom of plants and animals, biologists managed to centuries ago, to draw a clear line between them is still quite difficult.However, the first attempts to bring the basic qualities of plant and animal organisms have been undertaken Carl Linnaeus.Today, the experience gained by researchers around the world allowed to formulate the main points that explain what the animals differ from plants.
cytological level
The animals differ from plants in the first place?Speaking about the structure of plant and animal cells, it is worth noting that they have a similar structure and function.Every living cell contains a nucleus that carries the genetic information, and coordinates the life support cells;membrane, limiting cellular space and perform the safety function;cytoplasm that fills the space between them and is responsible for transportation of necessary substances.However, between the cells of plants and animals, there are significant differences.The cytoplasm of plant cells contain plastids, including chlorophyll - a substance that imparts color to the green parts of plants and involved in photosynthesis.The plant cell is also characterized by the presence of a rigid cell wall, allowing it to maintain the shape and show resistance to deformation.In turn, the animal cell has centrioles located in the cytoplasm, and plays an important role in the process of mitosis.
activity of living organisms
Another difference between animals from plants is the activity exhibited by organisms.The activity of animal organisms in search of food, adaptation to the environment remains consistently high throughout their lives, only slightly decreasing and reaching the peak value in certain periods.Activity significantly lower than plants.Motor activity of the plant includes a forced tropisms carried out by external factors (sun, earth gravity, etc.).
way of eating organisms
significant difference affects plants from animals and their way of eating.As autotrophic organisms, plants are able to produce their own organic matter from inorganic.Animals also are heterotrophic organisms, distinctive feature is ready to absorb organic matter and the inability to become a producer of organic compounds from inorganic.
Types of growth of organisms
Considering what animals differ from plants, it is also impossible not to address the problem of the growth of organisms.Plant growth is continuous and relatively uniform throughout the period of its life.The growth of the animal organism is carried out exclusively within specific periods and there is extremely uneven, reaching a peak value and virtually fading in time or another.Nevertheless, even considered than animals differ from plants, we can not spend as much as possible a clear distinction between these categories.
