An example of convergent evolution is the similar overall body structure of sharks and dolphins. The shark is a fish while the dolphin is a mammal, but their bodies have evolved to become similar. Another example is the adaptations for gliding found in both sugar gliders and flying squirrels.
While sharks and dolphins have no close family relationship in the evolutionary tree, they live in similar environments. Natural selection causes each of these species to evolve similarly. They need fins for swimming and a long sleek body to move through the water, yet sharks receive their oxygen through gills while dolphins must surface to breathe.
Sugar gliders are native to Australia, while flying squirrels are from the United States. Both animals have similar rodent bodies and skin attached between their body and forearm, allowing them to glide from trees. These two animals live in similar environments and their evolution allows them to survive using similar mechanisms.
Convergent evolution is not limited to the animal kingdom. Desert plants often evolve to develop water-holding chambers for survival in the arid region. While the plants of the American and African deserts are not closely related, they have similar evolutionary traits that have developed from separate branches of the evolutionary tree.Learn More
Lipids are a wide category of compounds that are known as biomolecules. Lipids include neutral fats, steroids, oils and waxes. They are created by the body naturally to be used in a variety of biological membranes and reactions.Full Answer >
Physical digestion is the physical process of breaking down food into smaller pieces that can easily be accessed by digestive enzymes, without making any chemical changes, whereas chemical digestion refers to the process through which the mammalian body further breaks down food substances into small, soluble chemicals that can be absorbed into the blood. The chewing of food and movement in the stomach contribute to physical digestion while natural catalysts aid chemical digestion.Full Answer >
A multicelled, or multicellular, organism is any living being comprised of more than one cell. Typically, multicellular life differentiates cells into specialized tasks, which in larger organisms can form tissues and organs. This allows multicellular organisms to have cells that are more efficient at a specific function of life.Full Answer >
The hamstring tendon attaches the hamstring muscle to an area just below the knee joint known as the tibia. It assists with hamstring muscle and aids in bending the knee. The hamstring muscle is located at the back of the thigh and stretches from the pelvis to the knee joint.Full Answer >