Species

line from species to species. Instead, evolution is more like a growing tree. This tree is called a phylogenetic tree, phylo meaning race, and genetic meaning genes and heredity. As this tree continues to thrive, more branches begin to grow and other branches begin to die. Once a branch dies, no new branches can grow from it because the branch represents a species and when a species dies, the species cannot evolve into subspecies. Due to this, species do change over time because species compete for

A keystone species is a species that has a unequal effect on its environment relative to its abundance, affecting many other organisms in an ecosystem and help manage the types and numbers of many others species in a community. A keystone species is critical for the survival of other species in its community. If a keystone species is driven to extinction it is likely that other species will also disappear. Many animals depend on these keystone species for food, or other benefits that aid in their

What defines a species is a very difficult question to answer. Variations are everywhere, but at some point those variations grow to where the species are different. Two common problems come up when looking at what makes a species a species. The first is what to do with hybrids and when are they considered a different species. The second is the issue of asexual reproduction. There are many different definitions of the word species and they all have their pros and cons when it comes to addressing

Keystone species are species that greatly impact the ecosystem that they are a part of. These impacts can come from all different components of the ecosystem, but ultimately they change the way the whole ecosystem functions. There are many different examples of keystone species, often times keystone species are found at the top of the trophic pyramid because they have the largest influence over the other species and the environment. However, many keystone species are not the top predator, in fact

A keystone species is a species whose presence in an ecosystem is crucial in determining the nature of the entire community, including its species composition and ecosystem functioning. Unlike dominant species, a species that greatly affects a community due to its large biomass or abundance, keystone species are usually not the most abundant species in a community. Even though they are present in relatively small numbers, the individuals of a keystone species profoundly influence the entire community

people when travelling to different countries is whether carrying the native-species across the boundary or not? One of the solutions to solve the lacking resources and native plant for agriculture and farming is that investigate other species from different country. This sound good for developing the economy but it is also the risk that can bring threat to the environment by interrupting the native food chain. Many species going through the natural immigration to the new area, also have to face with

Did you know that there are over one thousand endangered species of animals in the world as of today? Wildlife Conservation is the proceeding of saving animal and plant species from becoming endangered. If they are already endangered, people set up ways to save the species from becoming extinct. Extinction is when a species is no longer on Earth and the species will no longer be reproduced. In this essay we will discuss the issue of Wildlife Endangerment caused by human activities, natural causes

Finally selection this is after the species has separated, natural selection effects populations separately. As each area is different the selection pressures are different, in which why their characteristics are different as they are ‘selected for’ their habitat. An example of selection includes warrior ants, in which they have chemicals that tell other ants in their family not to attack. Some of these ants have adapted and learnt to imitate the chemical signal from other colonies so they can invade

and non-environmental) variants and drives evolution over time through the development of genetic variants as species adapt to different environments. Minor alterations in genetics can be observed in organisms that are more favorable for their particular environment. This is what is responsible for the evolution of species. Speciation is simply the formation of new and distinct species through the course of evolution driven by natural selection. Thus, biodiversity or the variety of all life on

The Endangered Species Act was enacted by Congress in 1973. According to Reference 1, this act requires the federal government to protect endangered species, threatening species, and their critical habits. Animals are protected from being harmed, sold, or traded and plants are protected if they are on federal property. The conservation success of this act is very important because it saves wildlife and plants from going extinct. Many people do not realize that the loss of a species can be disastrous