The process of natural selection refers to one of the mechanisms of the evolution of the species of living beings proposed by Charles Darwin and Alfred Russel Wallace, from which they explained the design of nature. For example: the white fur of arctic animals that allows them to hide in the snow. Natural selection occurs… Continue reading Examples for Natural Selection
Category: Biology
Where Do the Pollen Grains of Flowering Plants Develop?
The place of production of the pollen grain differs according to the plant: In gymnosperms (seed-producing plants), the pollen grain is produced in strobiles. While in angiosperms (flowering plants), the pollen grain is produced in flowers, specifically in the anther (the part of the stamen where pollen is produced). The anther is a kind of tissue-covered pouch that… Continue reading Where Do the Pollen Grains of Flowering Plants Develop?
Can We Breathe in an Environment of Pure Oxygen
What happens if you breathe pure oxygen: take a look at Divers Alert Network guidelines. Scuba equipment works by forcing compressed air into the lungs at the same pressure as the pressure of the surrounding water. The deeper you dive, the more air you use. For every 33 feet / 10 meters that you descend,… Continue reading Can We Breathe in an Environment of Pure Oxygen
Which Is the Longest-Living Organism on the Planet
This question came to mind after I read a 2013 news story about Ming. It is a clam from Iceland that was estimated to be 507 years old, which earned it the title of the longest-living animal on the planet. The clam was named after the dynasty that ruled China in 1499, the year in… Continue reading Which Is the Longest-Living Organism on the Planet
What Determines the Color of a Hens’ Eggs?
You may have noticed that chicken eggs shells come in different colors. Some people believe that brown-colored eggs are more nutritious than white-shelled eggs. Is this true? The eggshell is rich in calcium carbonate and acts as a chamber for the development of the embryo. Although many people believe that their color is related to… Continue reading What Determines the Color of a Hens’ Eggs?
Is the Skin a Tissue or an Organ?
When we study the levels of organization of the human body, we learn that cells group together to perform the same function. These groups of cells are tissues. These tissues, in turn, group to form a structure responsible for a specific function in a given system. An organ is a structure formed by several tissues.… Continue reading Is the Skin a Tissue or an Organ?
What are pandoraviruses and why some scientists doubt they are actually viruses
When the first pandoravirus was described a few years ago, scientists were clear that they were dealing with something unprecedented. Pandoraviruses are part of the family of giant viruses and can be up to 10 times larger than a common virus, even measuring as much or more than other small bacteria. In addition, they have… Continue reading What are pandoraviruses and why some scientists doubt they are actually viruses
What are the characteristics of life
10 Characteristics of Life: We explain to you what life is and what is the smallest unit in a living being. Also, its levels of organization and general characteristics. From biology, it has been classically defined as a living being that which is capable of being born, developing, reproducing and dying. So that life would… Continue reading What are the characteristics of life
What is the Origin of Life on Earth? Main Theories.
Since Darwin and his theory of evolution, we know that life has evolved over time and that in fact it has not always been like it is today. But how and when did life originate on Earth? Do all forms of life on earth have a common origin? Hydrothermal deep-sea vents The first microorganisms Photosynthesis… Continue reading What is the Origin of Life on Earth? Main Theories.
Can fashion influence human evolution?
Let’s take the example of the hipster beard. A man is dressing in a chic and casual manner. The beard, his fashionable accessory, full and gorgeous, carefully cared for. It could well be that these bearded specimens are currently more popular with the opposite sex than their beardless counterparts. As a result, they might be… Continue reading Can fashion influence human evolution?