josephine ebejer grech. bacteriophage influenza virus
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Josephine Ebejer Grech
Josephine Ebejer Grech
Bacteriophage Influenza Virus
Josephine Ebejer Grech
Influenza Virus Replicating
Josephine Ebejer Grech
Josephine Ebejer Grech
Spherical shaped bacteria
Cocci (sore throat)
Rod shaped bacteria
Bacilli (thypoid)
Bent bacteria
Vibrio (cholera)
Spiral shaped bacteria
Spirillum (syphilis)
Josephine Ebejer Grech
Culturing Bacteria1. Obtain a petri dish containing sterile nutrient agar.
Keep the lid on whenever possible.2. Sterilise a wire loop by passing it quickly through a
small bunsen flame.3. Using a sterile swab, place it at the end of the wire
loop and wipe your desk to check if there are bacteria there).
4. Make a zig zag streak on the surface of the agar in the new petri dish.
5. Place the lid on the petri dish and seal it with tape.6. Place the petri dish in an incubator at 37oC or over a
warm water bath over a bunsen burner (the water bath must be kept at around 37oC and not more).
7. After a day or two examine the dish to see if any bacteria have grown.
Josephine Ebejer Grech
Bacteria replicate every 20 minutes.
So after 20 minutes there will be 2Bacteria.
After 40 minutes there will be 4Bacteria
After one hour there will be 8Bacteria
After one hour 20 minutes thereWill be 16 bacteria
After one hour 40 minutes there willBe 32 bacteria.
After two hours there will be 64 Bacteria.
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Lichens
• A relationship between plants and fungi.
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Radial symmetry
Josephine Ebejer GrechBilateral symmetry
Josephine Ebejer Grech
Radial symmetry
Josephine Ebejer GrechRadial symmetry
Josephine Ebejer GrechBilateral symmetry
Josephine Ebejer GrechBilateral symmetry
Josephine Ebejer Grech
Kingdom AnimaliaPhylum ArthropodaClass Insecta
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Characteristics of Insects:1. Exoskeleton2. Jointed appendages3. Head, thorax and abdomen
In the phylum Chordata, the class amphibians (frog) performs metamorphosis
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Josephine Ebejer Grech
Phylum Chordata• Fish and
Amphibians and Reptiles are cold blooded.
• Birds and Mammals are warm blooded.
class features examples
amphibians moist permeable
skin
frog, newt, salamander
fish gills, wet scales goldfish, shark, cod
reptiles dry scales crocodile, lizard, snake
birds feathers, beaks budgerigar, sparrow, ostrich
mammals fur, produce, milk
rabbit, kangaroo, human, dolphin
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Class Fish
• Breathe using gills.
• Covered with scales.
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Class Amphibians
• Can live part of their lives on land and part in water.
• Grow by metamorphosis e.g. frog hatches from egg, becomes tadpole, and grows into a frog.
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Class Reptiles
• Hard scaly skin.
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Class Birds
• Covered with feathers
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Class Mammals
• Have mammary glands and suckle their youngs with milk
• Have their body covered with hair or fur.
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Soppa
• Butternut squash, tewm, werqa randa, 2 imgharef butir, basla, patata, zunnarija, 6 kikkri stokk tat-tigieg, nocemuskata, melh u bzar.
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Majjal
• 2 sinniet tewm, spinaci, tadam imqadded, habaq u klin, gobon artab, krema light, 300ml stokk tat-tigiega, qoxra ta’ lumija u l-meraq, 2 kuccarini mustarda dijon.
• Qatta pocket fil-majjal,• Imlieh• Aqlih fil-butir• Ahmi fil-forn• Zalza: stokk tat-tigieg, meraq tal-lumi, mustarda,
qoxra tal-lumija.
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ghagin
• Butir, basla, zalzett tal-majjal, tadam polpa, krema friska, nocemuskata, parmegjan, gewz, saghtar u cayenne.