Speciation

The Strength of the Yucca-Yucca Moth Interaction: Review of Past Scientific Studies Abstract The relationship between Yucca moths from Tegeticula, Parategeticula and Prodoxous with the Yucca plant (Agavaceae) has been observed over centuries. The strength of their interaction has created contradictory theories. Whether the relationship is obligate or falcultative is one of the ideas providing differing views. The effects of external influences have also been studied by many. In this review I…

Artificial and natural selection have many similarities and differences. These two concepts were both conceived by Charles Darwin. Natural selection is defined as the process where organisms have characteristics that help allow them to adapt to environmental problems, like changes in climate, predators, or competition for food. These organisms tend to survive and reproduce in greater numbers than the other fraction of their species. This guarantees that the prolongation of those…

& Garvey 2007). In summary, stomach content analysis is used in understanding of many aspects of fish ecology on individual, population, community and ecosystem levels. It helps us study and explain specific problems of interactions, evolution, speciation, invasions and fishery management nature protection. As a result, stomach content studies can be incorporated into a variety of different research objectives. Specifically, the real application involves a range of topics, such…

Our results found that populations 1 and 2 had similar means for tail shaft color, throat color, and malar stripe (see Table 1); however, the standard deviation for tail color between population 1 and population 2 greatly differs from the ones found in throat color and malar stripe. For the two populations (populations 3 and 4) on the edge within the hybrid zone, the mean greatly differ for all three traits with an average drop of 1.83 between the two populations for each of the three traits…

disadvantages, autopolyploidy may affect plant tolerance to some stresses such as drought, extreme temperature, pests and pathogens (Levin, 2002). Allopolyploidy or interspecific hybridization is an important evolutionary force for adaptation and speciation in plant groups (Barton, 2001). Allopolyploid plants often showed superior healthy feature compared to its two ancestors; this feature is known as…

Dragons’ Adaptive Strategies in the Iron Islands. With just four species of dragons of the eighteen that live on the continent of Westeros, the Iron islands possess a variety of niches were these species thrive without being adapted to the same island as the others as all the populations became isolated not by space (as dragons can fly) but by habitat (different resources); also, these dragons are the best example of the adaptive radiation process as a common ancestor species from Westeros…

I will admit before reading Chapter 3 and 4 of our textbook, I never would have linked biodiversity with biological evolution and definitely not with natural selection or what I always thought of as survival of the fittest. However, it does make sense. Biological evolution is the genetic change in a given species over time that leads to modifications in appearance, functioning, or behavior that enable the species to thrive in its natural ecosystem. Such evolution is usually brought on through…

and experiences its neighbors as if they were exactly the same. More specifically, this theory suggests all microbes in a particular environment have the same chances of reproduction and death regardless of species identity; again, the idea of speciation is entirely…

This shows how speciation occurred. The fossils records have few of the transitional form that shows the missing link between two species due to the nature of terrestrial environment. The example of this was the discovery of Tiktaalik which is the missing link between fish…

Evolution is the process where a species undergoes changes in traits over time to become a more complex and more adapted life form. The Out of Africa theory is possibly the most favoured evolutionary theory due to it's increasingly substantial evidence. This theory suggests that there were two colonisations of the world, the first being approximately 100,000 years ago when Homo erectus first migrated out of Africa and evolved separately creating three major species in different areas of the…