BY2

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  • Created by: katherine
  • Created on: 26-05-13 16:24
State the best technique for working out relasionships between descendants of animals
DNA profilng
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Name 5 features of carnivore dentition
Sharp incisors, Specialised premolars- carnassils, large, curved cainines, sharp incisors
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Name 5 features of herbivore dentition
DISAMATA seperates front teeth from side teeth, molars in WM arrangement for grinding cellulose, incosors on lower jaw only, cuts against horny pad of the upper jaw, molars have lard cusps gor griding
3 of 33
Why is the casum in rabbits full of bacteria
mammales unable to digest cellulose, bacteria break down cellulose cel wals
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3 ways which CO2 is transported in the human blood stream
85% in blood stream as bicorbonate ions,15% dissolved in plasma or in combination with heamoglobin
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name the enzyme that converts CO2 into carbonic acid
carbonic anhydrase
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What happens to bicarbonate ions in rbc
The pass into plasma
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Describe the function of hydrogen ions prodced in the RBC
Dissacociate oxyhaemoglobin to release O2, to be used in respiration by muscle
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Why is inc. in atmpspheric co2 a concern
ince acidity in water, death of fish, destrucion of reefs
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Explain what is ment by the term cohesion
Strong attraction that h20 molocues exert on each other
10 of 33
In the cohesion tension theory how is tension generated
Watewr molocules evaportaing through th estmata at top of column replace dfrom below, because of cohesion this creates an upward force throughout th ewhole column
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What additional force hwlps to support the water molocules in the xlem against th force of gravity
adhesion between water mlocules and hydropilic xylem wall
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What addisiotnal small force influences the upward movement of water
Root pressure
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explain how root pressure is generated
Active transport of ions into root xylem creates an osmotic gradient
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A plant in which atmospheric nirtogen is converted to nitrates
Legume
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Explain why small unicellular organiasm do not require a speciaised gas exchage and transport system
Enough o2 obtained by simple diffusion to satify respiritry requirtemtns, short diffusion pathway, low metablic rate, large sa:vol, fast enough
16 of 33
State the main ehypothesis used to explain the transport of organic solutes in plants
Mass flow hypothesis
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Name the compound required by plants to synthesis amino acids
Nitrates
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What exactly does a potometer measure
Water uptake by shoot
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What stewps would you take to assemble a potometer correctly
Cut shoots underwater, ensure joints are airtight, Keep leaves dry, set up apparatus underwater
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Give 2 reasons for loss of biomass between trophic levels of the food chain
Resperation, loss thorugh heat, not all of organism eaten
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2 sources of error in collecting data for pyramids of biomass
Dead organisms not collected, not all of plants collected, e.g roots
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2 sources of error in collecting data for pyramids of biomass
Dead organisms not collected, not all of plants collected, e.g roots
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The maine region of the gut where digestion takes place
mouth, stomach, small intestine
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The main region of the gut where absorption takes place
large intestine, small intestine
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Why does the tapeworm live in the intestine
Absorbes nutrienst from digested food
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How is the tapeworm adapted to overcome peristalsis
hooks and suckers
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HOw is it adapted to overcome digestive enzymes
Thick cuticle
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WHat do lymph vessels do
draisn tissue fluid
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Definition of autotroph
uses inorganic molocules to synthesis organic compounds
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Definitoin of a saprophyte
secretes enzymes onto food, absorbs products
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What blood vessles are found on the surface of the heart
coronary
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what does a goblet cell secrete
Mucus
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Other cards in this set

Card 2

Front

Name 5 features of carnivore dentition

Back

Sharp incisors, Specialised premolars- carnassils, large, curved cainines, sharp incisors

Card 3

Front

Name 5 features of herbivore dentition

Back

Preview of the front of card 3

Card 4

Front

Why is the casum in rabbits full of bacteria

Back

Preview of the front of card 4

Card 5

Front

3 ways which CO2 is transported in the human blood stream

Back

Preview of the front of card 5
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