Classification Concepts. The 3 Domains of Life 3) Eukaryotes 1)Bacteria 2) Archaeabacteria.
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Transcript of Classification Concepts. The 3 Domains of Life 3) Eukaryotes 1)Bacteria 2) Archaeabacteria.
Classification Concepts
The 3 Domains of Life 3) Eukaryotes
1)Bacteria2) Archaeabacteria
(1) The three domains of life are 1. ______________2. ______________3. ______________
(2) Humans belong to the ______________ domain.
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
I. Cells – the basic unit of life
all cells have genetic information in DNA
unicellular (one-celled organism)
multicellular (many cells)
(3) Humans are (unicellular or multicellular)?
(4) All organisms store genetic information in molecules of ______.
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
(5) The first organisms to evolve were
_________
(6) Humans are
____________ (write one: prokaryotes or eukaryotes)
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
Cell wall MATCHING
ORGANISMS(7)ANIMALS
(8)PLANTS
(9)FUNGI
(10) SOME BACTERIA
CELL WALL TYPE
No cell wall
Cellulose
Chitin
Peptidoglycan
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
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:
________________________
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
13) Humans have _______ chromosomes.____ from mom, ____ from dad.
14) Draw an organism undergoing binary fission.Provide two other types of asexual reproduction.
IV. Respiration
aerobic – requires oxygen
anaerobic
– lives in absence of oxygen
15) An example of an anaerobic species is :
________________________
V. General terms for habitats
terrestrial – lives on land
aquatic – water environment
marine = (ocean water environment)
FIND an example of
16) A terrestrial fungi:
________________________
17) An aquatic protist:
________________________
18) A marine animal:
________________________