This first topic in the book is similar to what I did last year:
MRS NERG - 7 Life processes
Movement
Respiration
Sensitivity to environment
Nutrition
Excretion
Reproduction
Growth
Animal and plant cell diagrams
Image source: waynesword.palomar.edu, http://chemistrybook2011.blogspot.com/2011/05/plant-cell-figures.html
Image source: http://www.tutorvista.com/biology/function-of-animal-cell
Differences between these two types of cells.
Image source: http://www.tutorvista.com/biology/function-of-animal-cell
AMOEBA
To read about amoeba - have a look at this site: http://www.biology-resources.com/amoeba-01.html
Then we looked at how an Amoeba would carry out each of the 7 life processes.
M- move by flowing of cytoplasm over the surface i.e mud, soil.
- pseudopods - changing the shape of their body.
R-"breathes" using a porous cell membrane (oxygen in - carbon dioxide out)
S- no special sense organs.
- changes in outside world detected by all parts of living material
- limited sensitivity e.g. moves away from light, but it has no photodetectors or eyes
N- food is engulfed by pseudopods (False foot) - forms a food vacuole.
E- ingestion and egestion can take place at any point on the surface
- no ‘mouth’ or ‘anus’.
R- a parent cell divides (Nucleus + cytoplasm divide)
= two smaller daughter cells i.e. asexually by binary fission
G- grows from nutrition - digesting food.
Other links:
What is a cell http://library.thinkquest.org/5420/cellwhat.html
(Oracle Think Quest - Projects by Students for Students)
Meaning of respire http://www.oum.ox.ac.uk/thezone/animals/life/respire.htm (Learning zone)
All about amoeba with photos http://www.fcps.edu/islandcreekes/ecology/amoeba.htm
Biology Teaching Resources
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