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Characteristics of Living Things

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... of Living Things Made of Cells unicellular vs.. multicellular Red Blood cells Onion skin epidermal cells Human ... reproduction: - asexual ... human beings 2 ... – PowerPoint PPT presentation

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Title: Characteristics of Living Things


1
Characteristics of Living Things
2
Characteristics of Living Things
  • Made of Cells
  • unicellular vs.. multicellular

Red Blood cells
Onion skin epidermal cells
Human cheek cells
3
Characteristics of Living Things
  • 2. Grows and develops
  • Increase in cell size and/or number
  • Includes development, aging, death
  • Differentiation cell specialization for
    a certain job

4
Characteristics of Living Things
  • 3. Obtains uses Energy
  • Metabolism (sum of all chemical reactions)
  • Anabolism- simple to complex
  • (build up rxns.)
  • Catabolism complex to simple
  • (break-down rxns.)
  • Heterotrophic (other feeding)
  • vs. autotrophic (self-feeding)

5
Characteristics of Living Things
  • 4. Reproduces
  • two kinds of reproduction
  • - asexual takes one
  • to make more
  • - sexual takes two

6
Characteristics of Living Things
  • 5. Responds to the Environment
  • a. Movement internal or external
  • b. Irritability - ability to respond to
  • a stimulus
  • Examples of stimuli sight, sound, touch,
    pressure, temperature, chemicals, color, light,
    other?
  • c. Adaptability

7
Taxonomy
  • A. Definition science of naming things
    assigning them to groups

8
Taxonomy
  • B. Why have a classification system?
  • 1. Single, universal name
  • 2. Avoid confusion
  • 3. Understand how living things are
  • related to one another

9
Taxonomy
  • What are the FIVE common names of this animal?

10
Taxonomy
  • Mountain Lion
  • Cougar
  • Puma
  • (Florida) Panther
  • Catamount

Rocky Mountain resident
Florida resident
11
Taxonomy
  • Wouldnt it be confusing if we didnt have a
    scientific name?
  • Felis concolor scientific name of the
  • mountain lion
  • Genus species

12
Taxonomy
  • C. Examples of classification systems
  • 1. Dewey decimal system library
  • 2. Sections of store music store
  • 3. Periodic Table of elements - Chemistry
  • 4. Others?

13
Taxonomy
  • D. Binomial nomenclature
  • System of scientific naming
  • Developed by Carolus Linnaeus
  • (Swedish botanist) in 1750s
  • Two part scientific name Genus and species
  • Must be underlined or in italics
  • In Latin (dead language of scholars)

14
Taxonomy
  • E. Example
  • Homo sapiens
  • (wise man)
  • 1. Scientific name
  • for human beings
  • 2. Homo genus
  • (capitalized underlined)
  • 3. sapiens species
  • (underlined, but NOT
  • capitalized)

15
Taxonomy
  • F. Definition of species
  • 1. breed successfully ? viable,
  • fertile offspring
  • 2. unique features similar to others of
  • same species
  • 3. have similar DNA to other species
  • members

16
Taxonomy
  • G. 7 Taxa of living things ( taxon group)
  • Kingdom (kings)
  • Phylum (play)
  • Class (chess)
  • Order (on)
  • Family (fine)
  • Genus (green)
  • Species (silk)

17
Taxonomy
  • H. Kingdom is least specific, largest group
  • I. Species is most specific,
  • contains only one kind of organism

18
Taxonomy
  • J. An example
  • Kingdom Animalia
  • Phylum Chordata
  • Class Mammalia
  • Order Primates
  • Family Hominidae
  • Genus Homo
  • Species sapiens

19
K. Other Systems of Classification
  • Cladograms

20
K. Other Systems of Classification
  • 2. Three Domain System

21
Taxonomy
  • L. What determines how something
  • is classified?
  • 1. DNA
  • 2. Structure

22
Taxonomy
  • 3. Embryology development

23
Taxonomy
  • L. ?There are 6 kingdoms of living things
  • 1. Archaebacteria
  • 2. Eubacteria
  • 3. Protista
  • 4. Fungi
  • 5. Plantae
  • 6. Animalia

24
Taxonomy
  • M. Definitions
  • Prokaryotic does not have a
  • nucleus to contain its DNA
  • Eukaryotic has a membranebound
  • nucleus

25
Taxonomy
  • N. Unicellular
  • Prokaryotic
  • 1. Archaebacteria ancient bacteria
  • 2. Eubacteria most bacteria
  • Eukaryotic
  • 3. Protista single-celled
  • O. Multicellular
  • 4. Fungi e.g. mushrooms
  • 5. Plantae - plants
  • 6. Animalia - animals
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