KEY%20CONCEPT%20Biology%20is%20the%20study%20of%20all%20forms%20of%20life. - PowerPoint PPT Presentation

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KEY%20CONCEPT%20Biology%20is%20the%20study%20of%20all%20forms%20of%20life.

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KEY CONCEPT Biology is the study of all forms of life. 1.1 Objectives Students will be able to define and give examples of Earth s biodiversity. – PowerPoint PPT presentation

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Title: KEY%20CONCEPT%20Biology%20is%20the%20study%20of%20all%20forms%20of%20life.


1
KEY CONCEPT Biology is the study of all forms of
life.
2
  • 1.1 Objectives
  • Students will be able to define and give examples
    of Earths biodiversity.
  • Students will be able to summarize the
    characteristics that all living things share.
  • Students will be able to summarize and give
    examples of the four major unifying themes of
    biology.

3
Earth is home to an incredible diversity of life.
  • The biosphere includes all living things and all
    the places they are found.

4
Earth is home to an incredible diversity of life.
  • Every part of the biosphere is connected with
    every other part.
  • The biosphere includes many environments.
  • land environments

5
  • The biosphere includes many environments.
  • saltwater and freshwater environments
  • portions of the atmosphere

6
  • Biodiversity is the variety of life.
  • Biodiversity generally increases from the poles
    to the equator.
  • Biodiversity is greater in areas with
    consistently warm temperatures.

Biodiversity is greater closer to the equator.
7
  • A species is one particular type of living thing.
  • Members of a species can interbreed to reproduce.
  • There are about 2 million different living
    species have been identified.

8
All organisms share certain characteristics.
  • Biology is the scientific study of all forms of
    life.

9
  • An organism is any individual living thing.
  • All are made of one or more cells.

10
  • An organism is any individual living thing.
  • All are made of one or more cells.
  • All need energy for metabolism.
  • All respond to their environment.
  • All have DNA that they pass on to offspring.

11
1.1 Review
  1. How are species related to the concept of
    biodiversity?
  2. How do the characteristics of living things
    contribute to an organisms survival?
  3. What is the relationship between cells and
    organisms?
  4. How does biodiversity depend on a species
    ability to reproduce?
  5. You respond automatically to many different
    stimuli, such as loud noises. Why might a quick
    response to a sound be important?

12
How are species related to the concept of
biodiversity?
  • Biodiversity is the variety and number of species
    in a given area.

13
2. How do the characteristics of living things
contribute to an organisms survival?
  • The cells that are the basic unit of life carry
    out the functions needed to support and maintain
    life, for which they require a continual supply
    of energy. The ability to respond to the
    environment helps an organism to avoid injury and
    death, as well as meet material needs.
    Reproduction and development enables species
    survival.

14
3. What is the relationship between cells and
organisms?
  • All organisms are made of one or more cells,
    which are the functional units of life, carrying
    out activities that support life.

15
4. How does biodiversity depend on a species
ability to reproduce?
  • Without the ability to reproduce, a species would
    become extinct, which would lead to a decrease in
    biodiversity.

16
5. You respond automatically to many different
stimuli, such as loud noises. Why might a quick
response to a sound be important?
  • A quick response could protect against hearing
    damage or a physical threat.

17
2
KEY CONCEPTUnifying themes connect concepts from
many fields of biology.
18
All levels of life have systems of related parts.
2
  • A system is an organized group of interacting
    parts.
  • A cell is a system of chemicals and processes.
  • A body system includes organs that interact.
  • An ecosystem includes living and nonliving things
    that interact.

19
2
  • Biologists study many different systems.

20
Structure and function are related in biology.
2
  • Structure determines function.
  • Proteins with different structures perform
    different functions.
  • Heart muscle cells have a different structure and
    function than stomach muscle cells.
  • Different species have different anatomical
    structures with different functions.

21
Organisms must maintain homeostasis to survive in
diverse environments.
2
  • Homeostasis is the maintenance of constant
    internal conditions.

22
2
  • Homeostasis is the maintenance of constant
    internal conditions.
  • Homeostasis is usually maintained through
    negative feedback.
  • Negative feedback systems return a condition to
    its normal (set) point.

23
2
  • Behaviors and adaptations can help maintain
    homeostasis.

24
Evolution explains the unity and diversity of
life.
2
  • Evolution is the change in living things over
    time.
  • The genetic makeup of a population of a species
    changes.
  • Evolution can occur through natural selection of
    adaptations.
  • Adaptations are beneficial inherited traits that
    are passed to future generations.

25
2
  • Evolution accounts for both the diversity and the
    unity of life.

26
1.2 Review
2
  • Describe a biological system.
  • Give an example of how structure is related to
    function in living things.
  • Why is homeostasis essential for living things?
  • What is the relationship between adaption and
    natural selection?
  • How are structure and function related to
    adaption?
  • How is the process of natural selection involved
    in evolution?
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