Organization of the Biosphere

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Questions and Answers

What is the smallest functional unit of life?

  • Organ System
  • Organ
  • Cell (correct)
  • Tissue

Which level of biological organization consists of multiple different species living together?

  • Ecosystem
  • Population
  • Community (correct)
  • Biosphere

Autotrophs are primarily characterized by their ability to:

  • Convert nonorganic compounds into organic forms (correct)
  • Form communities with other species
  • Consume organic matter for energy
  • Breed with other species

What term describes the interactions between different species?

<p>Interspecific (B)</p> Signup and view all the answers

Which of the following defines a population?

<p>The same species in the same area and time (D)</p> Signup and view all the answers

What defines an ecosystem?

<p>A community of species along with their abiotic factors (D)</p> Signup and view all the answers

Which of the following accurately describes autotrophs?

<p>Organisms that convert nonorganic compounds into organic forms (A)</p> Signup and view all the answers

In which scenario would intraspecific interactions occur?

<p>When individuals of the same species engage in mating (D)</p> Signup and view all the answers

What level of biological organization is characterized by multiple different species living together in the same area and time?

<p>Community (C)</p> Signup and view all the answers

What are organ systems composed of?

<p>Tissues that function together to produce life (D)</p> Signup and view all the answers

Flashcards

Species

A group of organisms that can naturally breed to create fertile offspring.

Community

Multiple different species living together in the same area and time.

Ecosystem

A community and its abiotic factors in an environment.

Intraspecific

Interactions between members of the same species.

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Interspecific

Interactions between members of two different species.

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What is a cell?

The smallest functional unit of life; a basic building block of all organisms.

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What is a tissue?

A group of similar cells that work together to perform a specific function, like muscle tissue for contraction or nervous tissue for signal transmission.

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What is an organ?

A group of different tissues that work together to carry out a larger, more complex function, like the heart pumping blood or the stomach digesting food.

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What is a population?

A group of organisms of the same species living in the same area at the same time, like a herd of elephants or a flock of birds.

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What is a producer/autotroph?

Organisms that get their energy from sunlight (phototrophs) or chemical sources (chemotropes), and convert nonorganic compounds into organic forms, forming the base of the food chain. Examples include plants and algae.

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Study Notes

Organization of the Biosphere

  • The biosphere encompasses all parts of Earth where life exists, including all ecosystems.
  • An ecosystem combines a community of organisms and its non-living (abiotic) environment.
  • A community is a group of different species living in the same area and time.
  • A population is a group of the same species inhabiting the same area during the same time period.
  • A species is a group of organisms that can naturally breed and produce fertile offspring.
  • An individual organism is a single member of a species.
  • Organ systems are groups of organs working together for specific life functions.
  • An organ is a collection of tissues with a shared function.
  • Tissue is made of similar cells performing related tasks.
  • Cells are the fundamental functional units of life.

Autotrophs/Producers

  • Autotrophs obtain energy from light (phototrophs) or non-organic sources (chemotrophs).
  • They convert non-organic substances into organic forms.
  • They are the first trophic level, supporting all other life.

Interactions

  • Intraspecific interactions involve members of the same species.
  • Interspecific interactions involve two or more different species.

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