Blog 10

The contamination of one animal in a food web can have a large effect on the entire food web itself let me explain why a food web has two basic animal species producers and predators the side effects of one being contaminated is that it sets off a chain reaction let me use a very basic example EX. someone poisons grass then a rabbit eats it and dies then a predator like a fox comes and eats that then it to dies and the rabbit population could be eating that same type of grass and dying then due to the chain effects some predators die and the population can go to ways the rabbit population can ether explode with not enough predators or the predators will outnumber the rabbits and can possibly extinct the species.

week 12 blog

Based on my dissections that I have preformed in class on species like a worn, starfish, and flower
I can say that they are completely different not only in the way that they live but also in there body structures like the starfish to the worm. The worm has a elongated digestive system where the starfish is well obviously not only in a star shape but is more centered than that of a worm also the starfish has a strong exoskeleton where the worm does not and thusly is easier to cut open but that also makes it more easier to damage while doing this important and necessary step. Like when you cut the worm you have to be gentle and light while cutting or you will destroy its entire digestive track.

opinion 11

I think that state parks should stay closed off from the general public because they are required to protect certain animal species and if the public gets in the environment along with the animals could be destroyed that and it could result in animal attacks going up because they are not used to existing with humans and do what there instincts tell them to do from simple protecting to survival

week 11 blog

My experience in the bird competition project was that the bird that was adapted to both stabbing and scooping was dominate in this case it was the fork that was the most dominate because it could stab and scoop for its prey where as the spoon could only scoop and the knife could only stab i think that it was the beak types that affected the outcomes of the game.

Blog 7

The reason that Darwins ideas where considered dangerous is because during his time the catholic church was in control of everything from religion to politics and his theory challenged there religion which they considered a attack on them and they did everything they could to discredit it

blog 6

The differences between divergent and convergent evolution is that divergent is when they share the same ancestor but have evolved differently. Whereas convergent is when animals with different ancestors manage to develop or evolve the same. Here is a for instance sharks and dolphins have developed fins and gills to suit them in there environment. here is another example of how they differ divergent is when an animal adapts or evolves due to the environment. Convergent on the other hand is similar but it is when another animal has a similar trait like insects and birds both of them developed wings but if you were to look at it you would see that the wings differ is by what they are made out of like birds are from there exoskeleton and has feathers but the insects are membranous outgrowth with nervules from the haemocoelom.

week 5 blog

Specialization can be formed by three different ways these three ways are called allotropic,peripatetic, and parametric During allopatric speciation, a population splits into two geographically isolated allopatric populations (for example, by habitat fragmentation building in the wild life The isolated populations then undergo genotypic and/or phenotypic divergence as they (a) become subjected to dissimilar selective pressures or (b) they independently undergo genetic drift. When the populations come back into contact, they have evolved such that they are reproductively isolated and are no longer capable of exchanging genes.

In peripatric speciation, new species are formed in isolated, small peripheral populations that are prevented from exchanging genes with the main population. It is related to the concept of a founder affect, since small populations often undergo bottlenecks. genetic drift is often proposed to play a significant role in peripatric speciation.

Observed instances

• Mayr bird fauna
• The Australian bird petrocia multicolor
• Reproductive isolation occurs in populations of drosophila subject to population bottlenecking

Thelondon underground mosqutoe is a variant of the mosquito Culex pipiens that entered in the london underground in the nineteenth century. Evidence for its speciation include genetic divergence, behavioral differences, and difficulty in mating. n parapatric speciation, the zones of two diverging populations are separate but do overlap. There is only partial separation afforded by geography, so individuals of each species may come in contact or cross the barrier from time to time, but reduced fitness of the hertrozygous leads to selection for behaviours or mechanisms that prevent breeding between the two species.

Ecologists refer to parapatric and peripatric speciation in terms of ecological niches. A niche must be available in order for a new species to be successful.