Download - Classification Concepts. The 3 Domains of Life 3) Eukaryotes 1)Bacteria 2) Archaeabacteria
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Classification Concepts
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The 3 Domains of Life 3) Eukaryotes
1)Bacteria2) Archaeabacteria
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(1) The three domains of life are 1. ______________2. ______________3. ______________
(2) Humans belong to the ______________ domain.
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How are organisms classified into groups?
ANSWER: By grouping them together based on characteristics such:
1) their cell structure
2) how they get food
3) how they reproduce
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I. Cells – the basic unit of life
all cells have genetic information in DNA
unicellular (one-celled organism)
multicellular (many cells)
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(3) Humans are (unicellular or multicellular)?
(4) All organisms store genetic information in molecules of ______.
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Two Types of Cells
prokaryote – cells without a nucleus
• no membrane organelles
• all bacteria
• ancient
(1st to evolve)
eukaryote – cells with a nucleus
• have membrane organelles
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(5) The first organisms to evolve were
_________
(6) Humans are
____________ (write one: prokaryotes or eukaryotes)
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Cell wall possibilities in organisms
1) no cell wall
2) cell wall made of cellulose
3) cell wall made of chitin
4) cell wall with peptidoglycan
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Cell wall MATCHING
ORGANISMS(7)ANIMALS
(8)PLANTS
(9)FUNGI
(10) SOME BACTERIA
CELL WALL TYPE
No cell wall
Cellulose
Chitin
Peptidoglycan
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II. Mode of Nutrition
Autotrophs – make their own food2 TYPES
photoautotroph – from light (photosynthesis)
chemoautotroph – from sulfur-based chemicals
Heterotrophs – eats other organisms
Ex.) decomposer – eats dead/decaying organisms
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Online
11) An example of an autotroph (that you never heard of) is:
________________________
12) An example of a heterotroph (that you have never heard of before) is:
________________________
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III. Reproduction
asexual (without sex) • binary fission – DNA copies and divides
(unicellular organisms)• offspring are clones (identical to parent)• 1N (one of each type of chromosome)
sexual - two parents• each provides half the offspring’s chromosomes• 2N (two of each, one from each parent)• *increases genetic variety in a species
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13) Humans have _______ chromosomes.____ from mom, ____ from dad.
14) Draw an organism undergoing binary fission.Provide two other types of asexual reproduction.
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IV. Respiration
aerobic – requires oxygen
anaerobic
– lives in absence of oxygen
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15) An example of an anaerobic species is :
________________________
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V. General terms for habitats
terrestrial – lives on land
aquatic – water environment
marine = (ocean water environment)
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FIND an example of
16) A terrestrial fungi:
________________________
17) An aquatic protist:
________________________
18) A marine animal:
________________________