Bull Panda Kiwi Sea star House cat Bison Sea turtle Moth Cocker spaniel Lion Frog Spider Duck-billed platypus Large-mouth bass Coral snake Cockroach Koala bear Hermit crab Shrimp Jellyfish Zebra Penguin Walrus Octopus
Evolution
The history and science of origin and evolution comprise two events, the beginning of life and expansion of life. Our earth originated about 4.5 billion years ago. The term evolution is derived from two Latin words and means the act of unfolding or unrolling. English philosopher Herbert Spencer first used it. Evolution is defined as the change in heritable traits of biological populations over successive generations. These traits are the manifestations of genes that are passed down from parent to offspring during reproduction.
Cladistics
Cladistics is a technique in the classification of organisms, where they are grouped into different clades. The proof for the relationships that are hypothesized is based on the shared derived characteristics known as synapomorphies. These characteristics do not exist in many of the distant ancestors and groups. The common ancestor along with its descendants is considered to be a part of the clade. The rate of closeness is directly proportional to the cladistic grouping and is useful in analyzing the evolutionary mechanism.
Outgroups
Outgroups are significant in studying cladistics or phylogenetics (that describe the evolutionary relationship between different organisms). Further, it is also important to understand the differences and similarities between different organisms.
Taxonomy
It is the branch of biology that works with the identification of organisms at first, then naming, and classification of them into phenetic or phylogenetic groups (a classification system). In other words, it is the scientific study of biological diversity and a part of systematic biology.
Phylogenetics
Phylogenetics is the scientific study of how various groups of organisms are related at the evolutionary level. It finds the relationship between various organisms based on their evolutionary similarities and differences. It is a part of the taxonomy. Although the taxonomic study is not only concerned about phylogeny but taxonomic studies are also concerned about the classification and nomenclature of the different individuals from different taxon.
Make a phylogenetic tree
![Bull
Panda
Kiwi
Sea star
House cat
Bison
Sea turtle
Moth
Cocker spaniel
Lion
Frog
Spider
Duck-billed platypus
Large-mouth bass
Coral snake
Cockroach
Koala bear
Hermit crab
Shrimp
Jellyfish
Zebra
Penguin
Walrus
Octopus](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7417bd5f-2419-4e76-8ad4-dbafa4580585%2Fe6178d14-4690-454b-bbf9-a754a215720d%2Fhqvxoio_processed.png&w=3840&q=75)
![The Tree of Life
(file:/C:/Users/arist/Desktop/constructing-a-phylogenetio-tree,pdf)
Procedure
1. Detach the following page of animals below.
2. Individually cut out each animal, including the name.
3. Lay all the animals out on your desk and separate them into two groups by presence of a backbone.
4. On a separate sheet of paper, start drawing your phylogenetic tree like this:
No
Backbone
Backbone
Common Animal Ancestor
5.
Continue separating the animals into smaller and smaller groups. Draw each division into your tree.
When an animal occupies its own branch, glue it to the end of that branch on your tree.
Repeat for all the other animals in your collection.
6.
7.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7417bd5f-2419-4e76-8ad4-dbafa4580585%2Fe6178d14-4690-454b-bbf9-a754a215720d%2Fy6qq2fb_processed.png&w=3840&q=75)
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