Friday, October 24, 2014

Summary Questions

                                                         Summative Summary Questions


1. Using an example, describe why a population could not increase for ever.

Because in some point if their is a lot of predators they wont be so much preys so the predators would decrease and the preys would start increasing and then the population of preys would start overpopulating the whole animal population so that's why we need predators so they can control the prey population.

2. What are the 2 factors that determine whether a population increases or decreases.

The first factor is the predators, and the second factor is the preys, because they determine the population of the whole predators. If we wouldn't have preys then the predators would starve to death because they wouldn't have anything to eat except themselves.

3. Give a reason why the human population of earth has continued to increase so much for the past hundred years?

First, because nothing eats us, we are the predators. And second, each day at least 400 babies are born, so the population is going to keep on growing and growing. In my personal opinion I think that the world is going to reach a point that the world would be completely overpopulated of humans.

Monday, October 20, 2014

Symbiosis

                                                                        Symbiosis

 In this essay I am going to explain what is Symbiosis. Symbiosis is close and often long-term interaction between two or more different biological species.The definition of symbiosis is controversial among scientists. Some believe symbiosis should only refer to persistent mutualisms, while others believe it should apply to any types of persistent biological interactions. Symbiotic relationships include those associations in which one organism lives on another, or where one partner lives inside the other. Symbiosis is also classified by physical attachment of the organisms, in which the organisms have bodily union is called conjuctive symbiosis. Also there is three kinds of Symbiosis; mutualism: The relationship between the flower and the bee. Commensalism: is a relationship between two species in which one species benefits while the other is not affected. And parasitism: is a relationship between to species in which one species benefits while the species it depends on, its host, is harmed. It connects to what we are learning because it connects to food webs because it relates to animals.