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Common Task 1 - Coggle Diagram
Common Task 1
Natural selection & genetic modification
Human origins
Neanderthals and us
What are fossils?
Characteristics of five kingdoms
plants
animals
multicellular, nucleus, no cell walls
fungi
live on dead matter, chitinous cell walls
protists
unicellular. nucleus
bacteria
virusses
classification
variation and evolution
Selective breeding
Genetic engineering
Key concepts
How enzymes work
active site
part of enzyme where substrate is broken down into products
substrate
the substance the enzyme breaks down
lock and key
active site has a complementary shape to the substrate: fits
Enzyme is a biological catalyst
Factors affecting enzymes
pH
temp
optimum
where the reaction takes place at the fastest rate
denature
active site changes shape so enzyme and substrate dont fit= no reaction
high temps, wrong pH
Digestive enzymes
amylase
carbohydrates
mouth and small intestine
glucose
protease
protein
amino acids
stomach & small intestine
lipase
fats
fatty acids and glycerol
small intestine
Plant structures and functions
Structure of a leaf
epidermis
transparent to allow light in
palisade mesophyll
chloroplasts for photosynthesis
spongy mesophyll
allows gasses to pass through leaf
stoma
gaseous exchange of oxygen and carbon dioxide
guard cell
controls size of stoma
xylem
carries water
phloem
carries glucose
Photosynthesis
equation
carbon dioxide + water + light= glucose + oxygen
products
oxygen, glucose
Factors affecting the rate of photosynthesis
Distance of lamp practical
Algal balls practical
pH changes due to presence of carbon dioxide
as carbon dioxide is used up, pH increases
Light
temp
carbondioxide