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B 4
everything on b4
| Question | Answer |
|---|---|
| what are the parts of a leaf? | cuticle, upper and lower epidermis;palisade and spongy mesophyll layers;stomata and guard cells; veins |
| how are leaves adapted to the efficient photosynthesis? | broad so large surface area;thin so short distance for gases to travel;contain chlorophyll to absorb light;have a network of veins for support and transport;stomata for gas exchange. |
| what does a pyramid of number what does it show you? | the numbers of organisms at each stage of a food chain |
| what does a pyramid of biomass show? | the mass of living material at each stage of a food web or chain |
| Explain how some energy is transferred to less useful forms at each stage (trophic level) in the food chain | heat from respiration;egestion. |
| what is the air space in a leaf? | the air space is between the mesophyll cells and it allows gases to diffuse easily and for it to reach all cells |
| what happens with the carbon dioxide and the oxygen in a leaf? | the carbon dioxide enters and the oxgyen exits through the leafs stomata, they move by diffusion. |
| what are the palisade cells do in a plant? | they contain a large number of chloroplast as it can absorb alot of the light energy |
| the purpose of the xylem ? | is that it carries water and minerals from the roots to the leavesand they are also dead. |
| the purpose of phloem ? | is that it carries dissolved food and suce as sugars form the leaves to other cells in the plants. |
Created by:
j marie robinson
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