Explain how to calculate the MAGNIFICATION of an image.
M= I/A Magnification = Observed size of the IMAGE (or drawing) / ACTUAL size of the specimen
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15
Why viruses are not considered living organisms and why aren't destroyed by antibiotics?
They can't live without a host (no MRS GREN). Antibiotics attack bacterial structures that viruses don't have (cell wall, cell membreane)
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20
Flowering plants can be classified into Monocotyledons and Dicotyledonds. Explain their 4 main differences.
Leaf shape (long and narrow vs braod), leaf veins (parallel vs branching), number of cotyledons (1 vs 2), grouping of flower parts (3 vs 5)
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25
Define the term DIFUSSION and name 2 examples.
NET MOVEMENT of molecules and ions from a region of their HIGHER CONCENTRATION to a region of their LOWER CONCENTRATION down a CONCENTRATION GRADIENT (random)
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20
Use all your knowledge about ENZYMES to explain the following image:
The rate of reaction is affected by pH, not all enzymes work at the same pH, there's an optimum pH, denaturalisation, etc.
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20
Biologists compare the s_________ of the b______in the ____ of organisms from different species to see how related they are.
sequences - bases
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15
Explain what is the BINOMIAL SYSTEM and how it is used.
A system of naming species in which the scientific name of an organism is made up of two parts showing the GENUS and the SPECIES. Eg. Homo sapiens
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baam
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gold
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rocket
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15
Define the term OSMOSIS and name 1 example
NET MOVEMENT of WATER MOLECULES from a region of HIGHER WATER POTENTIAL (diluted) to a region of LOWER WATER POTENTIAL (concentrated) through a SEMIPERMEABLE ME
