Discover and Diversity of Cells

Chapter 7 Section 1 Fall 2005, Pflugerville ISD

Discover and Diversity of Cells



Robert Hooke first to describe the cell. In 1665, he built a microscope and looked at cork or bark cells.He looked at plants, feathers, fish scales, and fly eyes.

Cite: http://www.mcrit.com/COMSOC/persones_tecniques/Robert_Hooke_archivos/Robert_Hooke.jpg


Anton van Leeuwenhook- looked at protist under his own microscope.He looked at blood cells and was the first person to see bacteria.He discovered yeast is a single-celled organism.


Cite: http://www.caribbeanedu.com/images/kewl/biomass01.gif



All organisms are made of one or more cells.The cell is the basic unit of all living things.All cells come from existing cells.



A plant cell is easier to see than an animal cell because of the cell wall.


Eukayotic – are the largest cells. These cells have a nucleus and membrane-bound organelles.

Prokaryotic – cells with no nucleus.



The Organization of Living Things

An organism that is singled celled is called unicellular.

Bacteria

Cite: http://www.aradio.co.uk/caption/bacteria.jpg


Asexual is a single parent produces offspring that are exactly like the parent.Most single-celled organisms are asexual.

Sexual are two parents produce an offspring that is not exactly like the parents.Sex cells combine and get half of its genes from the mother and half from the father.

Inheritance

Chapter 10 Section 1 Spring 2006 Pflugerville ISD

Life in the Environment


• Autotroph – organisms that make their own food. (Examples are plants, algae, and some bacteria)

• Heterotroph – organisms that must get their food from other organisms by eating or absorbing the nutrition. (Examples are animals, fungi, protozoa, slime molds, and some bacteria.)

Fall 2005, Pflugerville ISD


The environment is everything that affects an organism.Examples: animals, weather, & plants.Ecology is the study of the relationships between organisms and their environment.


Cite: http://www.wappingersschools.org/RCK/staff/teacherhp/johnson/visualvocab/ecology%5b1%5d.jpg



Biotic (Living): Trees, plants & animals

Abiotic (Nonliving): water, sunlight, air and rocks.

Cite: http://plato.acadiau.ca/courses/idst/matthews/Images/Ecology/Ecology%202.jpg



Anything that canlive on its own isan organism.

Population- groupof same organism

Organism

Population

Cite: http://www.nashvillezoo.org/komodo.jpg

Cite: http://photophoto.pwp.blueyonder.co.uk/images/indonesia/Komododragons.jpg


Community: different populations in same area.Ecosystem: community with nonliving environment.Biosphere: all ecosystems on Earth.

Com

mun

ity

Ecosystem


Classifying Organisms into Domains and Kingdoms


Archae Bacteria Eukarya

Archaebacteria Eubacteria ProtistaFungiPlanataeAnimalia



Archaebacteria- are not as common as eubacteria. These cells are single-celled organisms. They have circular DNA and they lack a nucleus and membrane-bound organelles.

Eubacteria- are the most common type of cells. They live everywhere. They don’t have a nucleus and they don’t have membrane-bound organelles.


Protista-kingdom that includes all single-celled eukaryotic organisms.

Fungi – kingdom that includes heterotrophic organisms.

Plantae- kingdom that includes multicellular autotrophic organisms.

Animalia-kingdom that contains multicellular heterotrophic organisms.


Discover and Diversity of Cells

Documents

pflugerville isddiscover

existing cells

bark cells

blood cells

sex cells

largest cells

prokaryotic cells

pflugerville isdlife