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define eukaryotes and prokaryotes
Eukaryotes are made up of eukaryotic cells and have more than one cell
Prokaryotes are made up of prokaryotic cells and are single celled organisms
Name all parts of an animal cell
Nucleus= contains genetic material
cytoplasm= gel like substance where most chemical reactions happen it contains enzymes
cell membrane= holds cell together and controls what goes in and out
mitochondria= most of the reactions for respiration take place
ribosomes= involved in translation of genetic material in synthesis of proteins
Name structures only in a plant cell
Rigid cell wall= made of Celulose it supports the cell and strengthens it
Large vacuole= contains cell sap maintains internal pressure
Chloroplasts= for photosynthesis occurs contain green substance called chlorophyll
Structures of bacteria cells
No nucleus
Ribosomes
cell membrane
plasmid DNA = small loops of extra DNA that are part of chromosomes
chromosomal DNA= floats free inside cytoplasm
flagellum= moves bacteria
How is an egg cells specialised
Contains nutrients inside Cytoplasm to feed embryo
haploid nucleus
after fertilisation membrane change the structure to stop any more sperm getting in
How is a sperm cell specialised
Longtail so can swim to egg
lots of mitochondria in middle section to provide energy needed to swim
Acrosome whichwhich stores enzymes needed to digests the membrane of egg cell
contains haploid nucleus
How are ciliated epithelium cells specialised
Have cilia on the top surface of cells to move substances along
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