Mostrando entradas con la etiqueta cells. Mostrar todas las entradas
Mostrando entradas con la etiqueta cells. Mostrar todas las entradas

miércoles, 20 de abril de 2016

The Protista Kingdom

 There is a wide variety of different organisms in the Protista Kingdom.

They can move in different ways. The amoeba uses pseudopods (pseudo= false, pod= foot):



http://images.medicaldaily.com/sites/medicaldaily.com/files/styles/full_breakpoints_theme_medicaldaily_desktop_1x/public/2014/08/28/ameoba.jpg


The paramecium uses cillia: 

http://www.biologycorner.com/resources/paramecium.gif

http://www.mikrowelt.info/02_Einzeller/03_Protozoen/IMAGES/PARAMECIUM_BURSARIA_201005A.JPG


 


Algae also belong to this kingdom.

http://protist.i.hosei.ac.jp/pdb/Images/Chlorophyta/Filamentous_algae/sp_9e.jpg


Some Protists, like amoeba, reproduce by cell division.

http://www.biology-resources.com/images/amoeba-fission-big.jpg

 Others reproduce by spores.



Monera Kingdom

Bacteria are part of the Monera Kingdom.  They are unicellular, and can have different shapes.

Some of them have  tail-like flagella that help them move around.

http://www.4to40.com/images/science/Monera_Characteristics/Monera_Characteristics.jpg


They reproduce by dividing.

http://leavingcertbiology.net/uploads/3/4/3/2/34323540/8719358.jpg?454

Some are autotrophs (they make their own food) and some are heterotrophs: they produce a substance that can break down plant or animal matter  to absorb the nutrients. 

Some bacteria can help us, and some can harm us. Bacteria can live in very cold temperatures and also very hot ones.

lunes, 22 de febrero de 2016

Looking at cells

Plant cells: watch the chloroplasts move!




Here is a short video about onion cells under a microscope.





Animal cells: frog's blood. You can see the nucleus, cytoplasm, and cell membrane.