3rd Form Definitions And Key Concepts Flashcards
Pathogen
A microorganism that causes a disease
Waxy cuticle
OPLTPWLVE
Outermost protective layer that prevents water loss via evaporation
Upper epidermis
TATLOCTALTEPM
Thin and transparent layer of cells to allow light to enter Palisade Mesophyll
Palisade mesophyll
LTPWC,TMLAFP/S
Layer tightly packed with Chloroplasts to maximise light absorption for Photosynthesis
Lower epidermis
Contains guard cells and stomata
Spongy mesophyll
LCIAS TISATVR FTDOG
Layer containing internal air spaces to increases surface area to volume ratio for the diffusion of gases (mainly
Carbon Dioxide)
Guard cell
CTC TOACOS BAA LWTRGE
Cells that control the opening and closing of Stomata by absorbing and losing water to regulate gas exchange
Stomata
M-SOFAC BGC TRGE APWL
Mouth-shaped opening flanked and controlled by Guard cells to regulate gas exchange and prevent Water loss (via transpiration)
Vascular bundle
CXAPTTSTAFTL
Contains xylem and phloem to transport substances to and from the leaf
Xylem
TWITL FMCTUIP/S AFTFS
Transports water into the leaf for mesophyll cells to use in photosynthesis and for transpiration from stomata
Phloem
Transports sucrose and amino acids around the plants
Enzyme
Protein molecule that acts as a biological catalyst by speeding up the rate of specific reaction without being used up or affected
Food chains
STFRBLO
Shows the feeding relationships between living organsims
Food webs
SHFCALTIMCFR
Shows how food chains are linked together into more complex feeding relationships
Pyramids of numbers
STPOEO AETLIAFC
Shows the population of each organisms at each tropic level in a food chain
