117377
Description
Flashcards by cigirlrocks999, updated more than 1 year ago
|
Created by cigirlrocks999
almost 11 years ago
|
|
| Question | Answer |
| What is diffusion? | It is the movement of particles from an area of high concentration to an area of low concentration. |
| What is water used for in plants? | To keep leaves cool, for transporting minerals, to keep cells turgid and for photosynthesis. |
| What is lysis? | It is when an animal cell gains water by osmosis and bursts. |
| What is xylem vessels used for? | For transporting water and dissolved minerals. |
| What are phloem vessels used for? | For moving food substances around the plant (translocation). |
| What is the structure of xylem vessels? | They are hollow and have thick cellulose cell walls. |
| Which ecosystem has a bigger biodiversity, artificial or natural? | Natural ecosysytem. |
| What is active transport? | It is when substances are absorbed against a concentration gradient. |
| What are palisade cells? | Plant cells which contain large amounts of chloroplasts. |
| What is meant by plasmolysed? | When a plant cell loses lots of water. |
| What is glucose converted into in plants? | Starch - for storage Cellulose - for cell walls |
| What is the process of photosynthesis? | Light energy splits water into oxygen and hydrogen ions. Carbon dioxide reacts with the hydrogen to make glucose. |
| What are the limiting factors of photosynthesis? | Temperature, Light intensity and Carbon dioxide concentration. |
| How are leaves adapted for photosynthesis? | Thin, large surface area, waxy cuticle, palisade cells and air spaces. |
| What is the equation for population size using the capture/recapture method? | No. in 1st sample X No. in 2nd sample ____________________________ No. in 2nd sample previously marked |
| What is meant by self-supporting? | It can maintain it's self without any external inputs except an energy source, i.e the sun. |
| What is an ecosystem? | It is a physical environment with a particular set of conditions, plus all the organisms that live in it. |
| What is a community? | The populations of different |
| What is population? | A population is the total number of individuals of the same species that live in a certain area. |
| How 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. |
| What 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. |
| What is zonation? | Zonation is the gradual change in the distribution of a species across a habitat. |
| What is osmosis? | Osmosis is the net movement of water particles from a dilute area to a more conentrated one across a partially permeable membrane. |
Want to create your own Flashcards for free with GoConqr? Learn more.