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Chapter 20: Problem 4

Which of category, below the level of Kingdom, would have the next largest number of organisms? a. Order b. Phylum c. Family d. Class

Short Answer

Expert verified
The correct answer is b. Phylum.

Step by step solution

01

Identify the Taxonomic Hierarchy

Recall the taxonomic hierarchy in biological classification: Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species. This order helps determine the levels of classification.
02

Determine the Position Below Kingdom

Below the level of Kingdom, the next immediate category is Phylum. Write down the hierarchy to visualize the order: Kingdom, Phylum, Class, Order, Family, Genus, Species.
03

Find the Category with Largest Number of Organisms

Since Phylum is immediately below Kingdom and groups many different organisms, it has the largest number of organisms compared to the other listed categories.
04

Confirm the Correct Answer

Phylum, being directly below Kingdom, encompasses a large diversity of organisms. Therefore, the answer is b. Phylum.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Kingdom
In biology, the concept of Kingdom is a high-level category in the taxonomic hierarchy used to classify organisms.
Each kingdom groups together organisms that share basic structural and functional traits. There are five main kingdoms:
  • Animalia (animals)
  • Plantae (plants)
  • Fungi (fungi)
  • Protista (single-celled organisms)
  • Monera (bacteria)
By broadly grouping different species, kingdoms help scientists understand vast biological diversity. Each kingdom encompasses a massive variety of organisms, making it the highest level of classification beneath the broader tier of Domains.
Phylum
Phylum is the next category directly below Kingdom in the taxonomic hierarchy. It organizes organisms based on significant structural features.
For instance, the animal kingdom is divided into multiple phyla, such as:
  • Chordata (animals with a backbone)
  • Arthropoda (insects, spiders, crustaceans)
  • Mollusca (snails, clams, squids)
  • Annelida (segmented worms)
Phylum groups a large diversity of organisms by focusing on core anatomical similarities. This category helps to simplify the classification by breaking down kingdoms into more specific groups. Since Phylum is positioned directly below Kingdom, it encompasses a vast number of different organisms compared to categories like Class, Order, or Family.
Biological Classification
Biological Classification, also known as taxonomy, is the scientific process of categorizing and naming living organisms based on their relationships and characteristics. The main goal is to understand and organize the diversity of life on Earth. The standard hierarchy used is:
  • Domain
  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species
Each level in this hierarchy represents a rank, with Domain being the broadest and Species being the most specific.
By following this structured system, scientists are able to identify and study organisms efficiently. This classification also helps in understanding evolutionary relationships and how different organisms are connected through common ancestry.

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Most popular questions from this chapter

How does a phylogenetic tree relate to the passing of time? a. A phylogenetic tree relates to the passing of time because species branch off from each other at regular time intervals. b. A phylogenetic tree is not related to the passing of time because speciation is based on geographic changes. c. The phylogenetic tree only shows the order in which things took place. d. A phylogenetic tree relates to the passing of time when the diagram also shows how long ago the divergence from the common ancestor occurred.

Judeo-Christian religious texts explain that the Earth and all the organisms on Earth were created in seven days. Why is this not a valid scientific hypothesis?

Explain the ring of life model. a. The ring of life model is a phylogenetic model where the three domains of life started as distinct groups that could swap genes horizontally with each other in all directions. b. The ring of life model is a phylogenetic model where all three domains of life are said to have developed from a pool of primitive prokaryotes. c. The ring of life model is a phylogenetic model where bacterial and archaeal cells fused to form eukaryotic cells. d. The ring of life model is a phylogenetic model where there is only a single domain of life due to modern DNA analysis.

What is the correct way to format a two-word scientific name? a. Italicize both words. Both words are lower case. b. Italicize both words. The first word should be capitalized. The second word should be lower case. c. Italicize both words. Capitalize both words. d. Underline both words. Capitalize both words.

How is systematics related to phylogeny? a. Systematics provides guidelines that scientists use to describe the relationships of organisms. b. Scientists use systematics programs to put together the phylogeny of an organism. c. In systematics, scientists use combined data based on evolutionary relationships from many sources to put together the phylogeny of an organism. d. Systematics is a process used to put together the phylogeny of an organism.
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