What is adaptive radiation class 12

More • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Speciation and Adaptive radiation: • The fast evolution of various species from a common parent species is referred to as adaptive radiation. • Speciation occurs as a result of adaptive radiation. • When a group of individuals within a species gets departed from the rest of the species and the development of its own distinct features takes place, this is known as speciation. • It is the process of creating a new microbe, plant, or animal species.

\( \newcommand\) • • • What is next for life on Earth? Life is dynamic! Species begin, populations grow, species die out, new species are born. Extinction is an important part of this. If organisms never went extinct, there wouldn't be any habitats available for new ones to arise. What could be next? Extinction Most of the species that have lived have also gone extinct. There are two ways to go extinct. The most obvious way is to die out completely. The other way a species goes extinct is if it evolves into a different species. Extinction is a normal part of Earth's history. Most of the organisms that have lived have gone extinct. Sometimes large numbers of species go extinct in a short amount of time. This is a mass extinction. The causes of different mass extinctions are different: collisions with comets or asteroids, massive volcanic eruptions, or rapidly changing climate are all possible causes of some of these disasters ( Figure below). An extinct Tyrannosaurus rex. This fossil resembles a living organism. Adaptive Radiation After a mass extinction, many habitats are no longer inhabited by organisms because they have gone extinct. With new habitats available, some species will adapt to the new environments. Evolutionary processes act rapidly during these times. Many new species evolve to fill those available habitats. The process in which many new species evolve in a short period of time to fill available niches is called adaptive radiation. At the end of this period ...

Reason Ancestral seed-eating stock of Darwin's finches radiated out from South America mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats. Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds.

What is adaptive radiation and examples? Adaptive radiations are best exemplified in closely related groups that have evolved in a relatively short time. A striking example is the radiation, beginning in the Paleogene Period (beginning 66 million years ago), of basal mammalian stock into forms adapted to running, leaping, climbing, swimming, and flying. What is adaptive radiation explain with an example class 12? The process of evolution in which new species are produced from a single point and radiate in different directions is known as adaptive radiation. This is possible due to natural selection. One of the most common examples of adaptive radiation is that of Darwin’s finches which he found on Galapagos islands. Which best explains adaptive radiation? The encounter of a population to multiple of new or newly formed ecological niches is followed by diversification of ancestral line into different forms which in turn occupy a diverse ecological niche. The process is referred to as adaptive radiation. Thus, the correct answer is option C. What causes adaptive radiation? Adaptive radiations can be triggered by extrinsic factors such as the arise of new ecological opportunity via emergence of novel environments, and/or by intrinsic factors (‘key adaptive innovations’) that increase the availability of niches to a diversifying lineage [1–3, 7, 9]. Which of the following is an example of adaptive evolution? An example of adaptive evolution is the horse’s teeth. Its teeth are ...