Problem 1 - Campbell Biology

Question

All the organisms on your campus make up (A) an ecosystem. (B) a community. (C) a population. (D) a taxonomic domain.

Step-by-Step Solution

Answer

The organisms on the campus make up a community.

Step 1: Identify all the organisms on campus

Consider all the living organisms found on the campus, including plants, animals, bacteria, fungi, etc.

Step 2: Understanding what the groups represent

Analyze each term: (A) Ecosystem - this includes all living organisms in a particular area, along with non-living components. (B) Community - this includes all living organisms in a specific area living together. (C) Population - this refers to a group of individuals of the same species living in a certain area. (D) Taxonomic domain - this is a broader classification including groups like Bacteria, Archaea, and Eukarya.

Step 3: Match the definitions with the scenario

All the organisms on the campus include multiple species and their interaction, which fits the definition of a community. Both ecosystems and taxonomic domains involve more than just the organisms present on campus. Populations do not account for multiple species, only single species groups.

Step 4: Choose the correct answer

Based on the definitions and the scenario given, the best choice that matches all organisms on the campus is (B) a community.

Key Concepts

ecosystem

An ecosystem consists of all the living organisms in a specific area, interacting with each other and their non-living environment. In simpler terms, it includes plants, animals, bacteria, and fungi, along with factors like sunlight, soil, water, and air. An ecosystem can be as small as a pond or as large as a forest. The interactions within an ecosystem are essential for the survival and energy flow among the organisms.
Notice that in an ecosystem:

• Both biotic (living) and abiotic (non-living) components are included.
• Energy flows from the sun to producers (plants) and then to consumers (animals).
• Decomposers, such as fungi and bacteria, break down dead organisms, returning nutrients to the soil.

Understanding an ecosystem helps us see the big picture of how life forms depend on each other and their surroundings for survival.

population

A population is a group of individuals of the same species that live in a particular area. For example, all the oak trees in a forest or all the pigeons in a city are considered populations. Populations are fundamental units of ecological study because they focus on individuals of a single species and their interactions.
Key characteristics of a population include:

• Size: The number of individuals in the population.
• Density: How many individuals live in a unit area or volume.
• Distribution: How individuals are spaced out across the area (clumped, uniform, or random).
• Growth rate: How the number of individuals in the population changes over time.

Studying populations helps us understand species survival, reproductive patterns, and impacts of environmental changes.

taxonomic domain

The concept of a taxonomic domain helps in classifying all living organisms into broad categories. There are three primary taxonomic domains: Bacteria, Archaea, and Eukarya. This classification is based on cellular organization and genetic differences.
Here's a brief overview of each domain:

• Bacteria: Single-celled organisms without a nucleus, known for their diversity and adaptability.
• Archaea: Single-celled organisms similar to bacteria but with different genetic and biochemical properties, often found in extreme environments.
• Eukarya: Organisms with cells that contain a nucleus, including animals, plants, fungi, and protists.

Understanding taxonomic domains helps us categorize the incredible variety of life on Earth, making it easier to study and understand evolutionary relationships.