Flashcards
B4 , B5 and B6
Cards in this deck (23)
- 1What are palisade cells?Plant cells which contain large amounts of chloroplasts.
- 2What is the structure of xylem vessels?They are hollow and have thick cellulose cell walls.
- 3What are phloem vessels used for?For moving food substances around the plant (translocation).
- 4What is xylem vessels used for?For transporting water and dissolved minerals.
- 5What is lysis?It is when an animal cell gains water by osmosis and bursts.
- 6What is water used for in plants?To keep leaves cool, for transporting minerals, to keep cells turgid and for photosynthesis.
- 7What is diffusion?It is the movement of particles from an area of high concentration to an area of low concentration.
- 8How are leaves adapted for photosynthesis?Thin, large surface area, waxy cuticle, palisade cells and air spaces.
- 9What are the limiting factors of photosynthesis?Temperature, Light intensity and Carbon dioxide concentration.
- 10What is the process of photosynthesis?Light energy splits water into oxygen and hydrogen ions.
Carbon dioxide reacts with the hydrogen to make glucose. - 11What is glucose converted into in plants?Starch - for storage
Cellulose - for cell walls - 12What is meant by plasmolysed?When a plant cell loses lots of water.
- 13What is active transport?It is when substances are absorbed against a concentration gradient.
- 14Which ecosystem has a bigger biodiversity, artificial or natural?Natural ecosysytem.
- 15What is the equation for population size using the capture/recapture method?No. in 1st sample X No. in 2nd sample
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No. in 2nd sample previously marked - 16What is meant by self-supporting?It can maintain it's self without any external inputs except an energy source, i.e the sun.
- 17What is an ecosystem?It is a physical environment with a particular set of conditions, plus all the organisms that live in it.
- 18What is a community?The populations of different
- 19What is population?A population is the total number of individuals of the same species that live in a certain area.
- 20How do you estimate an animal population?You catch the animals and record the number, mark them, release the animals for a period of time and get a second sample.
- 21What are the asumptions made when using capture/recapture data?Do death, immigration, emmigration.
You collect each sample the same way.
The marks don't affect the animal's survival rate. - 22What is zonation?Zonation is the gradual change in the distribution of a species across a habitat.
- 23What is osmosis?Osmosis is the net movement of water particles from a dilute area to a more conentrated one across a partially permeable membrane.