Monday, September 22, 2014

Piltdown Hoax Essay

       The Piltdown ‘human’ was found in South East England in the early 1900’s. This piece of fossil was found by a worker who then gave it to Charles Dawson, an archaeologist. This fossil was very important for Dawson theory. Dawson then met a geologist, Sir Arthur Woodward and  an anatomist, Arthur Keith and Telihard.  In February 1912, Dawson published his discoveries and his thought about how it have the evidence of an ape-like jawbone and human-like teeth. This cause the scientific community in uproar. For England this was a great new, for they finally can have a proof that they also have old human-ape-like fossils found in their land. However, in 1949 they tested the fluorine content of the fossil and found out that the age of the fossil is less than 100 years old. They also found an artificial stain and the teeth had been filled on the fossil and in the end they found out that the fossil belonged to a female orangutan whose teeth had been filled so it will look like a human-like teeth. Big suspicion was given to Charles Dawson who was thought wanted to make it to the high class of scientific society. Dawson also found many other fossils with the same artificial stain found in the Piltdown’s fossil. In the end, the discovery was just a Hoax. It doesn’t have a any connection between human and ape at all.

       Being humans we all have faults which cause all of us to make mistakes whether they are intensional or not.  In this scenario, pride, and lack to details are some of the faults that were present. Lack of details occurred when they uncovered new early human fossils from different parts of the world they should have compared them to the piltdown discovery to see if there were any underlining similarities between the fossils which should have been present. Same basic jaw structure, teeth, and format of the skull would have been some basic things to look for when comparing the piltdown man and other early human fossils finding from different parts of the world. Pride was by far the biggest fault involved with this scenario, pride for his country and wanting to be recognized by the scientific community is what most say is the major motivation they say that Charles Dawson had to making the forgeries. He wanted to be accepted by the scientific community for his findings and also wanted England to have one of the earliest human fossils to ever be found he felt such discoveries would be England on top of the scientific community at the time. 

       About 10 years later, in the 1920’s scientist were digging up remains in Asia and Africa that were less human, not more human, yet were relatively younger than the Piltdown man remains found in England. While these remains lead to questions of the Piltdown mans authenticity or evolution path, the technology was not available during the time to fully study the bones. After WWII a new technology was created that allowed scientist to measure the fluorine content in fossils allowing them to give the fossils a date.  The test is called a fluorine analysis and was conducted on the Piltdown fossils in 1949. The fluorine analysis showed that the remains were only around 100 years old, rather than the previous claim that they were 1 million years old.  In 1953 scientist conducted an even more thorough exam of the fossils with better dating methods. The exam revealed that the staining on the bones was superficial, materials were cut with a steel knife after being fossilized and the teeth in the jaw showed groove lines providing evidence that the teeth were filed down to make them look more human. Belonging to a female orangutan, the jaw bone was modified to make it look less ape-like in shape and the canines were filed down to make them look more human. After the extensive examination, scientist concluded that the Piltdown fossils were not real.

      I wouldn't say remove human factors but remove desperation and self-pride as initial motives for finding the next great discovery. Emotions alone can cause conflicts in science creating bias theories which are not feasible for proper research. The personal human factors can cause damage to the continuity of studies, generations could be mislead like this situation with the Piltdown Man, everything demands the fundamentals of scientific research. Frauds like Charles Dawson, could have motives that was so eager to be noticed for finding a simple ape jaw he wanted the world to think he found something pertaining to man. As disgusting as it sounds his motive to present a lie is not honored, but the positive thing is that it make the scientist more aware of these types of frauds, should have been soon than later.



      I believe that there are several life lessons that can be learned from this historical event, the most important one is that if you start something new, you should finish it no matter what. Also, if you want to prove something, back it up with your own facts, provide evidence of your work, so that others can believe you and listen to you. 



Wednesday, September 17, 2014

Dentition Patterns

Lemurs
Lemurs eating habits consists with foods like leaves, flowers, buds, bark, fruits. Lemurs have a very nutrition diet, 
but occasionally they eat insects and small animals such as mice. Lemurs’ dentition is heterodont, they have many 
teeth with morphologies, the dentition pattern is 2. 1. 3. 3. 2 incisors 1 canine, 3 premolars, 3 molars. Their teeth are 
mostly used for grooming and feeding. Lemurs are naturally found on the Comoro Islands and Madagascar islands, 
an island located about 250 miles off the coast of southern Africa in the Indian Ocean. Lemurs live in trees which is 
why they called arboreal. They are also highly adaptable to what the area have to offer them. Some live in the rain 
forests, while others live in very hot and dry areas. Lemurs have been in existence for more than 50 million years. 
They have adapted from solitary animals to live in groups of more than 30.  

                                                    

                           









Spider Monkeys    
Spider Monkey inhabit Central America, South America, and Mexico. All three regions have 
tropical environments. Spider monkeys differ from Prosimians, in regard to their jaw and teeth. They have two 
incisors, 1 canine, 3 premolars and 3 molars. They have no hypoconulids on the first 2 lower molars. A dental 
formula is used to describe the number of each type of tooth that specifies a certain species. The dental formula for a 
spider monkey is 2. 1. 3. 3. Spider monkeys stay near the tops of canopy trees. The trees serve as a defense from 
predators below. This explains why their diets consist mostly of fruits, bird eggs, insects and seeds.


Baboon
Baboon are usually found in the sun-Saharan Africa. Baboon prefer a semi - arid habitat. Africa's climate range 
from tropic to subarctic. Baboons are really flexible species that can live practically on trees or lands. They are 
a species that can almost survive an environment. They eat fruits, grasses, roots, bark, and seeds. Baboon diet is 
flexible like the species themselves, since they live on land and in trees they consumption depends on their location. 
Baboons have powerful jaws, as well as long teeth. This traits helps to defend against predators, as well as complete 
for food. A baboon dentition pattern is 2. 1. 2. 3. much different from that of spider monkeys. 


Gibbons
Gibbons are usually found in Southeast Asia, China and Islands. The climate is warm, humid, and could be 
generally characterized as monsoonal. The gibbon species is the smallest of the apes species. The trees of the region 
are topical, and are abundant in fruit. Gibbons enjoy eating figs, but they also eat bark and leaves because they 
spend most of their time in trees and feed on fruits trees. Gibbon's dental formula is 2. 1. 2. 3. same as baboons. 
They have shortened jaws with long canine teeth as shown in the picture. 



Chimpanzees 
Chimpanzees are usually found all across Central Africa. They inhabit both tropical forest and bordering savannas 
in Africa. They consume ripe fruit and young leaves. Chimpanzees have 32 teeth, 16 on upper jaw and 16 on bottom 
jaw. They use their molars to grind fruits and leaves. Chimpanzees usually hang around on the trees because they 
have everything they need on trees, and that is why they do not come on land. They live on their own or usually 
mother stay with their offspring. The dental formula is 2. 1. 2. 3. same as baboons and gibbons. 

















Wednesday, September 10, 2014

Analogy & Homology

1)   Homologous trait is any characteristic of organisms that is derived from a common ancestor. Homology also means that there are two species that have related parts that do similar things, but that are not exactly the same. The two different species that possess the homologous trait are true seals and sea lions. They both share the homologous trait of a flipper. The two largest marine mammals live together in the sea water.


2)  The difference between Sea Lions and Seals:
  • The sea lion flipper is long, hairless and has short claws, while true seals front flipper is short, covered in fur and has long claws.
  • Seals uses back flippers for power when swimming and sea lions uses front flippers for power when swimming.
  • Seals eat krill, fish, lobster, birds, while sea lions eat squid, octopus, birds and fish.

Seals and Sea lions have different homologs traits because true seals have similar front flippers because their bodies adapted more for water then land. The sea lion rotate his hind legs forward and walk on all four flippers while the true seal will slide his body across land.


3)  The common ancestor of sea lions and seals is the Enaliarctos. The Enaliarctos had a short tail and developed limbs with webbed feet. They lived 24-22 millions years ago. Enaliarctos is said to have both it’s hind and front flippers for swimming. From the history, it shows that the sea lions lost the ability to swim with their hind flippers and seals lost the ability to swim with their front flippers.


4) Sea Lions                                                               Seals
sea loin.jpg                                                                                 seal.jpg
 

Answer (2)



1)  The two different species that possess the analogous trait are butterfly wings and bat wings. They both have structural similarities because both butterfly and bat evolved for the same task and flight.

2)  The analogous trait of butterfly and bat have a lot of things in common such as, they have equal number of caterpillar species, and they both are functionally same (both fly). Species may also have similar traits even though they are not related to each other. This usually results because the species live in similar environments and fill similar ecological roles. The similarity between convergent evolution affected species is called Homoplasy.


3) Yes, both butterfly wings and bat wings can have the common ancestor to possessed this analogous trait. We know that these traits are analogous because their have different structures that is why they are not genetic, they are an analogous.

4) Butterfly Wings Bat Wings


bat.jpg
butter.jpg


             




3.jpg








Wednesday, September 3, 2014

Protein Synthesis

Hey there, 
           Here is my DNA strand, I hope you will figure this out..Good Luck 

    ATTUTACCAAGATCGCACGCAAGCAAGCCCCAAATTGATCGCCA