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What is politomy and what does it represent?
A polytomy is a 3-way split in the evolutionary tree where evolutionary relationships between the two outermost branches are not yet clear. It represents an unresolved pattern of divergence in evolution.
How do you draw orgel diagrams?
To draw orbital diagrams, you first need to determine the electron configuration of the element. Then, you place electrons in the orbitals following Hund's rule and the aufbau principle. Finally, represent each electron as an arrow pointing up or down in the orbital diagrams to show the spin of the electron.
What two things are compared when patterns of evolutionary relationships are constructed using molecular phylogenetic?
When constructing patterns of evolutionary relationships using molecular phylogenetics, researchers typically compare DNA, RNA, or protein sequences from different organisms. By analyzing similarities and differences in these molecular sequences, scientists can infer evolutionary relationships and determine how closely related different species are. This comparison allows for the construction of phylogenetic trees that visualize these relationships over evolutionary time.
Body parts in two different animals that are similar in structure are said to be?
Homologous structures. These structures suggest a common evolutionary ancestry between the two animals, indicating that they have descended from a shared ancestor. Examples include the pentadactyl limb found in many vertebrates, including humans, cats, and whales, illustrating their evolutionary relationship.
What are some physical features that the Australopithecus have?
Australopithecus had a combination of human-like and ape-like features, such as a small brain size, large teeth, a projecting face, and a robust body adapted for both walking on two legs and climbing trees. They had a unique blend of traits that positioned them as intermediate between apes and early humans in the evolutionary tree.
What was the first animal in the evolutionary tree to possess two body openings?
mollusks
What is an evolutionary?
If two organisms share an evolutionary relationship, that means that they have a common ancestor on the evolutionary tree. The more recently the shared common ancestor lived, the more closely related the two present organisms are, evolutionarily.
How are the ditchotomous keys and branching diagrams tools used differently?
Dichotomous keys are used to identify species based on a series of choices between two characteristics at each step. Branching diagrams, such as cladograms, show the evolutionary relationships between species based on shared characteristics. Dichotomous keys are more focused on identification, while branching diagrams are more focused on evolutionary history.
What is represented by the branch points of an evolutionary tree?
Branch points on an evolutionary tree represent common ancestors from which two or more different lineages diverged. They indicate where species or groups shared a common ancestor before evolving along separate paths.
What does it mean for species to have an evolutionary relationship?
If two organisms share an evolutionary relationship, that means that they have a common ancestor on the evolutionary tree. The more recently the shared common ancestor lived, the more closely related the two present organisms are, evolutionarily.
What are venn diagrams used for?
Venn diagrams are used for comparing more that two items in a chart. A Venn diagram compares like possibilities of a group of related objects or things. A family tree is a type of Venn diagram.
What are the two different tree diagrams that show how to determine the prime factors of 72?
72 36,2 18,2,2 9,2,2,2 3,3,2,2,2 72 8,9 8,3,3 4,2,3,3 2,2,2,3,3
How does polymorphism in cnidarians contribute to their evolutionary success?
Polymorphism or different phenotypes in a single species could be responsible for the diversity in the cnidarians evolutionary tree which happens to be extremely diverse and complex, ultimately increasing its chances of survival.
Draw the probability tree diagram for flipping the coin two times showing the outcome?
Each toss outcome has a probability of 1/2; picture copied from the related link. The related link does a good job explaining tree diagrams and probabilities.
What is branching descent?
The rise of two species from one species in a continuing process that resembles the branching of a tree or bush. This is called phylogenetic evolution and is the main driver of species arising over time.
What is the significance of branch length in a phylogenetic tree and how does it impact the interpretation of evolutionary relationships among different species?
Branch length in a phylogenetic tree represents the amount of evolutionary change that has occurred between two species. Longer branches indicate more genetic changes over time, suggesting greater divergence. This impacts the interpretation of evolutionary relationships by showing the degree of relatedness between species - closer branches indicate more recent common ancestry, while longer branches suggest more distant relationships.
What is the most accurate evidence of an evolutionary relationship between two organisms?
The most accurate evidence of an evolutionary relationship between two organisms is the presence of shared genetic similarities, specifically in their DNA sequences. This indicates a common ancestry and evolutionary history between the two organisms.
