Biology: Life on Earth
Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 18, Problem 1FTB

The science of naming and classifying organisms is called __________. The related science of reconstructing and depicting evolutionary history is called __________. A group consisting of all organisms descended from a particular common ancestor is a(n) ____________.

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Summary Introduction

To review:

The given blank space in the statement, “the science of naming and classifying organisms is called ______. The related science of reconstructing and depicting evolutionary history is called _______. A group consisting of all organisms descended from a particular common ancestor is a _______.”

Introduction:

Classification of organisms is important in their respective hierarchical group. It helps in the prediction of earlier life forms on the basis of their character similarities. Also, classification set a standard format to study the organism in a new and better way. The systematic study of an organism based on certain perspectives help to establish a relationship between different kinds of species on the basis of their evolutionary characters.

Explanation of Solution

Taxonomy: It is a type of methodology used to classify the biologically active organism into their respective hierarchy. They are arranged and placed in a highly organized manner depending on the extent of shared characters. A taxon is described as one unit comprising of a specific type/group of organisms. This type of classification was first developed by Carolus Linnaeus. The classification consists of eight ranks: domain, kingdom, phylum, class, order, family, genus, and species.

Systematics: It is a type of study explaining the existence of various life forms present in their evolutionary aspects. This helps in establishing a relationship between the present organisms their ancestral species. The study is visualized and analyzed as an evolutionary tree. It is also known as phylogenetic trees. The main component of this study involves branching order and branching length. The classification and identification of species are done on the basis of the evolutionary changes. Thus, it is a method to study the extent of change in either the morphological or physiological trait in an organism via evolution.

Clades: It is a type of family tree of an organism, which joins its branches from a common ancestor to all organisms diversified from the ancestor. It is helpful in predicting the evolutionary history of an organism. The determining feature of this tree is based on the homologous characters of the organism. This establishes a relationship between the descendants of the organism to its recent form by analyzing them on various aspects.

Conclusion

Thus, the science of naming and classifying organisms is called taxonomy. The related science of reconstructing and depicting evolutionary history is called systematics. A group consisting of all organisms descended from a particular common ancestor is a clade.

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_____ is the field that scientists use to organize and classify organisms based on evolutionary relationships using fossils or DNA. Whereas, _____  is the science of classifying organisms in a hierarchal model.
Biologists assign each organism on Earth to a species containing similar organisms.  Related species are grouped into a _________, which is the next-larger type of biological taxon.  The scientific name of a species starts with this larger taxon, and ends with a "specific epithet". Group of answer choices Order Genus Class Family
Which statement best explains why the classification schemes of taxonomists have changed over time? Some groups of organisms have unusual biochemistry. There are no guidelines as to how organisms may be classified. Improved technology increases the amount of information known about organisms. Newly discovered organisms are always being added to the lowest levels of classification systems.
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