1911148
Description
Flashcards by Danielle-May, updated more than 1 year ago
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Created by Danielle-May
over 9 years ago
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| Question | Answer |
| How do Unicellular organisms get and get rid of substances in order to live? | The substances can diffuse directly in and out of the cell across the cell membrane. The diffusion rate is quick because of the short distances the substances have to travel. |
| Why can multicellular organisms not get and get rid of substances via diffusion? | Direct diffusion from the outer surface would be too slow, as the substances need to travel large distances to reach every single cell. |
| What do the xylem tubes transport? | The xylem carry water and mineral salts |
| How do xylem tubes transport water and mineral salts? | From the roots up the shoot to the leaves in the transpiration stream. |
| What do phloem tubes transport? | The phloem tubes transport sugars, like sucrose, and amino acids from where they're made in the leaves to other parts of the plant |
| What is the movement of food substances around a plant called? | Translocation |
| How are root hairs adapted to take in water? | Each branch of a root are covered in millions of hairs. Therefore, the plant has a big surface area for absorbing water from the soil. |
| Water is taken in to the root hairs by which process? | There's a higher concentration of water in the soil than inside the plant, so water is drawn into the root cell by OSMOSIS |
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