B4 science topics

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How does capture and recapture effect the organisms chance of survival?
the marking makes them more viable to predators or makes them camoflague with their surroundings
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What do detritivores do?
feed on dead and decaying material, increase surface area, break up substances to smaller bits, speeds up decay
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What are saprophytes?
extracellular digeston, secret digestive enzymes, break down material, then absorbed by saprophytes
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Explain the structure of the xylem vessels?
made of dead cell, lumen down the middle, Thick walls (cellulose, plant support) carry water and minerals
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Explain how stomata work?
close automatically when unable to absorb water at roots, allow gases in and out, open during the day, close at night
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What are guard cells?
open and close the stomata (turgid or flaccid)
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What is hydroponics?
plants grown without soil, nutrient solutions (water and fertilizers) grown in barren soil.
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What are the advantages and disadvantages of hydroponics
AD = Minerals can be controlled, diseases can be controlled. DIS = fertilisers added, no support for plants
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What did NEWLANDS (1864) do?
every 8th element had similar properties (newland's octaves), pattern broke at TM, left no gaps, mixed up metals and non metals (critisied)
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What is MENDELEEV (1869) do?
put elements, atomic mass, had to leave gaps, predicted undiscovered elements.
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What precipitates do the halide ions make?
CHLORIDE = white. BROMIDE = cream. IODIDE = yellow
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Other cards in this set

Card 2

Front

What do detritivores do?

Back

feed on dead and decaying material, increase surface area, break up substances to smaller bits, speeds up decay

Card 3

Front

What are saprophytes?

Back

Preview of the front of card 3

Card 4

Front

Explain the structure of the xylem vessels?

Back

Preview of the front of card 4

Card 5

Front

Explain how stomata work?

Back

Preview of the front of card 5
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