Species diversity

Due to the wide variety of plants and animals throughout the world, and their similarities and differences is what proves evolution, according to Chapter 4: The Geography of Life, the biogeography can only be explained by evolution of all the, “diversity of life on continents and islands,” (Coyne, 2009, p. 109). Even though, this idea of evolution is different than previous chapters; must be remembered, that Jerry Coyne is explaining the whole theory, so they are all connected and part of the…

synthesized her whole presentation in this statement: “What to do without Keys? Unlocking the amazing biodiversity of Alabama’s freshwater snails and the worms that live within them”. Alabama is home to 173 of 516 species of North America freshwater gastropods, and home of 118(is) of the 162 species of freshwater periwinkles. Biology, being such a wide field, why does Dr. Tolley-Jordan chose to study snails? Snails are really easy to work with. In Cahaba River, snails are constantly there due to…

assisting in hatching) (Hazlett, 1983). Care of recently hatched juveniles is rare in invertebrates, and evolved mainly in terrestrial and freshwater species (Thiel, 2000). The freshwater crayfishes show some of the most complex patterns of parental care among decapods (Hazlett, 1983). The majority of studies with these animals refer to Northern Hemisphere species (Astacidae and Cambaridae). A large part of these describe the embryonic development and the specialized structures that the…

Raven et al. (2014) defines biogeography as a study of the geographic distribution of species, and ties tougher how the species are related or not related and natural selection. Moseley et al. (2014) define biogeography as the study of patters that may form in the biotic environment and we can use the scientific process and information gathered from the past and present to study the distributions of plants and animals. Moseley et al. (2014) are the only authors that go into details about why we…

There are about 100 million unique species on Earth. Living organisms exhibit unity because they use the same processes for seizing and storing energy, producing proteins, and passing on the information through genes from generation to generation. At the same time living organisms exhibit diversity because there are so many different species. All life on Earth is related because everything came to be from common origin yet beginning 4 billion years ago. Throughout the time living things have…

fact that the earth as we know it has proceeded through 5 “waves” of mass extinctions, and is currently in the middle of yet another wave of mass extinction (the sixth). These “unnatural” occurrences have displayed shocking changes to the variety of species on the globe, hence the title: “The Sixth Extinction, An Unnatural History.” 2. What gave people the idea that organisms may have gone extinct because of catastrophes? The term extinction didn’t really exist until the early 1800s,…

Microevolution “Microevolution is evolution on a small scale, within a [shared gene pool] population” (Berkeley 2006). The shared gene pool experiences genetic changes that can create differences within a species. These genetic differences are inherited from one or both parents. Genes are either lost or combined differently and can result in things such as different hair color, longer legs or bigger ears. There are four processes that contribute to microevolution: 1. Mutation – a physical…

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…

would cause many humans to die. Humans need to feel safe in their environment, humans should not fear for their lives due to causes such as poor environmental conditions. Humans share this planet with many other species and if one species is in trouble due to the environment, then all the species are in trouble because it will affect the needs of many organisms. The number of…

Title: To investigate the reproductive structures of the plants and to understand its importance in the survival of plant species. Introduction: Angiosperms are the dominant form of plant life in most terrestrial ecosystems, comprising about 90 percent of all plant species. Most crop and ornamental plants are angiosperms. Their success results, in part, from two innovative structures: the flower and the fruit. Flowers are derived evolutionarily from modified leaves. The main parts of a flower…