Science
-
Upload
gabriele-genchi -
Category
Technology
-
view
596 -
download
0
description
Transcript of Science
Science: CellsScience: Cells
Cells - IntroductionCells - Introduction There are two types of cells: eukaryotic There are two types of cells: eukaryotic
and prokaryoticand prokaryotic. .
•Fungi
•Protists
•Plants
•Animal
•Archaea
•Bacteria
Eukaryotic cellsEukaryotic cells
Fungi: heterotrophic, reproduction by spore
Protists: autotrophic
Plants: photosynthesis, autotrophic
Animal: heterotrophic, sexual reproduction
Prokaryotic cellsProkaryotic cells
Archea: no nucleus, autotrophic and heterotrophicArchea: no nucleus, autotrophic and heterotrophic
Bacteria: heterotrophicBacteria: heterotrophic
Differences between Differences between prokaryotic cell and prokaryotic cell and
eukaryotic celleukaryotic cell
Animal cellsAnimal cells
A membrane around the cellA membrane around the cell Cytoplasm: chemical activities, Cytoplasm: chemical activities,
mitochondrionmitochondrion Nucleus: genetic code, control Nucleus: genetic code, control
centre fo the cellcentre fo the cell Mitochondrion: organellesMitochondrion: organelles
Plant cellsPlant cells The plant cells have some key features in The plant cells have some key features in
common with animal cells (Membrane, common with animal cells (Membrane, cytoplasm, nucleus, mitochondrion)cytoplasm, nucleus, mitochondrion)
Cell wall: strengthens the cellCell wall: strengthens the cell ChloroplastsChloroplasts :contain chlorophyll, for :contain chlorophyll, for
photosynthesisphotosynthesis Permanent vacuole: help cell, with sap Permanent vacuole: help cell, with sap
cellscells
Specialised cellsSpecialised cells
Leaf cell: absorbs light for photosynthesis
Root hair cell absorbs water and mineral ions
Sperm cell: reproduction male cell
Red blood cells: carry oxygen, with haemoglobin
Tissue, organ and system
Tissue: a group of cell
Organ: a group of tissue
System: a group of organ
Osmosis
Osmosis: chemical process, the water moves across a membrane, from a more concentated solution to less concetrated solution.
Diffusion
Diffusion: when the solute moves from regions of higher concentration to regions of lower concentration.