|Table 2: Classifications|
|Classification Level||American Green Tree Frog||European Fire- Bellied Toad||Eastern Newt|
The newt is far related from the other two since frog and toad have no tail in adulthood. The newt has a resemblance to the salamander since they both have long tails in their adulthood. According to the diagram, in the order level of classification, both the American green tree frog and the European fire bellied toad are termed as Anura. The frogs and toads have long hind legs that are helpful when jumping. The newts have long bodies and short legs adaptable for walking and swimming rather than jumping. The newt also is able to grow limbs after losing them. This isn’t the case with the frogs and the toads.
It is now possible to classify all organisms on earth thanks to DNA sequencing. All organisms that resemble each other are easily grouped to understand their history. In the classification, we are able to learn how plants and animals are related to each other and therefore understand the history of evolution. With DNA sequencing, we are now able to predict the future. Thanks to sequencing, we are able to see traits that are on molecular level
To classify an organism, I will first start with the simple classification then delve to deeper or tiny differences. I will observe its domain, then kingdom then phylum. Is the organism a plant or an animal? Does the organism have mobility? How does it feed and what does it eat? After identifying the simple differences, I will observe the deeper similarities it shares with other organisms of the same class. I will also compare the environment that it grows or lives in with other known organisms available.
Exercise 1: Dichotomous Key Practice
|Table 3: Dichotomous Key Results|
From the classification, we start from the simple differences to the minute differences. It is easy to classifly an organism as bacteria, eukaryota or archaea. With further analysis, we see differences in organisms that appear same on the naked eye.
The linear classification system has aided in the identification of organisms. It is quite easy now to match new research with other classified organisms while identifying their differences and similarities. The Linnaean classification system is essential to a scientists daily routine. When a species is identified, one can compare through the system to see if it was classified before. The Linnaean classification has eight taxa which are; domain, kingdom, phylum, class, order, family, genus and species.
Exercise 2: Classification of Organisms
Data Tables and Post-Lab Assessment
Table 2: Key Characteristics of Some Organisms
|Defined Nucleus||Motile||Cell Wall||Photosynthesis||Unicellular|
|Figure 4: Exercise 2 – Classification of Organisms Flow Chart|
From the diagram, we see that organisms under domain Eukarya and domain bacteria are the only ones represented. Organisms under the Archaea domain were not represented. The Archaea domain was originally included into the bacteria domain but after careful analysis, they were seen to be different since they have Phytanyl on the cell membrane while bacteria contain fatty acids.
Does the cell membrane contain fatty acids?
Does the cell embrane contain phytanyl?
Does the organism contain a cell wall?
Is the organism unicellular or multicelular?
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