1. Introduction to Biology

Life's Organizational Hierarchy

Exploring Different Levels of Biological Organization

All the organisms on your campus make up
a. an ecosystem.
b. a community.
c. a population.
d. the biosphere.

No. A single cell can be considered a biological system, but there is a better answer.

No. A pond can be considered a biological system, but there is a better answer.

No. The biosphere can be considered a biological system (a very complex one), but there is a better answer.

Consider the different scales at which a biologist might work.

Which of the following can best be considered a biological system?

At which point of the organizational hierarchy does life emerge?

DRAW IT With rough sketches, draw a biological hierarchy similar to the one in Figure 1.3 but using a coral reef as the ecosystem, a fish as the organism, its stomach as the organ, and DNA as the molecule. Include all levels in the hierarchy.

GCSE Biology - Levels of Organisation - Cells, Tissues, Organs and Organ Systems  #13

Use the word bank to complete the pyramid of life’s organizational hierarchy below.Word Bank: Population Organelles Organ System Cell Tissues Ecosystem Organ Community Molecules Multicellular Organism<img src="https://lightcat-files.s3.amazonaws.com/problem_images/9d5f3e702e9bff12-1598973349816.jpg" class="fr-fic fr-dii">

Emergent Properties

All the organisms on your campus make up 
a. an ecosystem.
b. a community.
c. a population.
d. a taxonomic domain.

are apparent only when an organism is studied at the molecular level

No. Consider the meaning of the term emergent.

are evident during only one portion of the life cycle of an organism

are due to the arrangement and interactions of parts as complexity increases

Emergent properties can be recognized by comparing levels in the hierarchy of biological organization.

Emergent properties of living systems are properties that __________.

From Atoms to Biosphere: Biology Tutorial

Organization of Life

Life's Organizational Hierarchy Example 1

Cells are the basic unit of life and all organisms are composed of one or more cells.

Neurons can control which ions they keep inside and outside their membranes.

Cells are made of simple molecules, but when organized together, these molecules can perform living functions.

Molecules can form large chains by joining together multiple atoms.

Which of the following is the best example of an emergent property?

No. Consider what happens to waste from animals in an ecosystem and what happens to energy in a system such as an ecosystem.

No. Consider what happens to the energy in sugars produced by producers and what happens to the waste materials, such as carbon dioxide, released by producers.

No. In terms of matter (such as nutrients), Earth is effectively a closed system. Materials are neither created in nor lost from a closed system.

Consider the characteristics of each of the different types of eukaryotic life.

In an ecosystem, nutrients __________ and energy __________.

Biology can be described as having both a vertical scale and a horizontal scale. Explain what that means.

Levels of Organization

Biological Levels in Biology: The World Tour

Ecosystem → Biosphere → Population → Community → Organism.

Biosphere → Ecosystem → Population → Community → Organism.

Ecosystem → Community → Biosphere → Population → Organism.

Biosphere → Ecosystem →Community → Population → Organism.

Which of the following options has the correct order in terms of the hierarchy of the organization?

A biologist studying interactions among the bacteria in an ecosystem could not be working at which level in life’s hierarchy? (Choose carefully and explain your answer.)
a. the population level
b. the molecular level
c. the organism level
d. the organ level

No. A bee colony has properties that are not displayed by individual bees.

No. The way that water molecules bond together creates properties in a collection of water molecules that are not displayed by individual water molecules.

No. Take a calculator apart. Do any of its parts perform the same tasks that the calculator together performs?

Remember that in emergence, new properties appear due to complexity that arises as a result of the combination of simpler components.

Which of the following systems does not display emergent properties?

No. Members of the same species may be geographically isolated and unable to interact with one another.

No. The entire array of different species within a given ecosystem comprises a community.

No. All of the different populations within a given ecosystem compose a community.

Consider the hierarchy of biological organization.

What is the appropriate term for an interbreeding group of individuals of a single type occupying a defined area?

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2. Chemistry

3. Water

4. Biomolecules

5. Cell Components

6. The Membrane

7. Energy and Metabolism

8. Respiration

9. Photosynthesis

10. Cell Signaling

11. Cell Division

12. Meiosis

13. Mendelian Genetics

14. DNA Synthesis

15. Gene Expression

16. Regulation of Expression

17. Viruses

18. Biotechnology

19. Genomics

20. Development

21. Evolution by Natural Selection

22. Evolution of Populations

23. Speciation

24. History of Life on Earth

25. Phylogeny

26. Prokaryotes

27. Protists

28. Plants

29. Fungi

30. Overview of Animals

31. Invertebrates