Sunday, 25 March 2012

Task 6 23/3/12



TASK 6

Functions of cell parts 
Nucleus: Control all activities in the cell and also contains genetic information passed down from one generation to another.
Nucleur membrane: Regulate in and out movement of only specific substances. It also. In animal and plant cells, it holds the nucleus together and also acts as a security check for the nucleus.
Chromatin: Packs long strands of DNA in Compact form and also strengthens and assists replication and transcription during cell division.
Cytoplasm: Maintains the shape and consistency of the cell and also stores many chemicals that are inevitable for life.
Cell membrane: Controls the movement in and out of the cell and also anchors the cytoskeleton.
Vacuole: Stores food and nutrients in the cell, maintains pH, removes unwanted material in our body and also destroys invading bacteria.
Mitochondria: Produce energy, helps in the building of certain kinds of drought and also stores calcium ions
Chloroplast: Helps the plant to make food.
Cellulose cell wall: Protects the cell, provides support for the cell and is also a filter.  



Task 4&5 23/3/12

TASK 4&5




http://www.enchantedlearning.com/subjects/plants/cell/anatomy.GIF
http://www.enchantedlearning.com/subjects/animals/cell/anatomy.GIF

Task 3 23/3/12


TASK 3


PLANT CELL
ANIMAL CELL
- have cell wall
- does not have cell wall
- have only 1 big vacuole
- have 1 or many small vacuoles
- rectangular in shape
- irregular in shape
- leaves cell contains chloroplast
- all cells do not contain chloroplast
- plant cells are larger in size
- animal cells are smaller in size









Task 2 23/3/12


TASK 2






Similarities between plant and animal cell

-Both have cell membranes
-Both have nucleus
-Both have Mitochondra
-Both have Ribosomes
-Both have Golgi Apparatus



Thursday, 22 March 2012

Task 1 23/3/12


Task 1
Task 1
Prokaryote cells
Eukaryotic cells
Smaller cells
Larger cells
Always unicellular
Often multicellular
No nucleus
Have nucleus
DNA is circular
DNA is linear
No cytoskeleton
Have cytoskeleton
Cell division is by binary fission
Cell division is by mitosis
Reproduction is always asexual
Reproduction can be asexual or sexual