BIO 106 Exam 1 WSU

BIO 106 Exam 1 WSU Which of the following statements is most likely to be true? - Water flows into the direction of the lowest water potential. Plasmolysis is a cellular loss of water. How can a cell potentially prevent this? - Increasing the cytoplasmic solute concentration What is correct about stomata movement control? Pick the Best. - Two of the above. Which tissue will an aphid quite specifically try to suck on? - Phloem The water potential in the root of a plant is higher (more positive) than that in the soil. Where does the water move to preferentially? - To the soil Which of the following approaches is likely most successful in preventing soil erosion? - Farming using contour tillage Which of the following statements is correct about Rhizobia? - They are able to generate ammonia from atmospheric nitrogen. Which statements is true about nitrate (NO3-)? - Nitrate uptake in plants is an independent process that results in a proton gradient. What are the three main tissues in a plant? - Dermal, vascular, ground tissue Which of the following roots is developed in response to low oxygen? - Pneumatophores What is a likely reason that tropical trees develop buttress roots? - They provide the trees with additional stability support Roots gain length primarily through... - elongation growth Leaves are normally photosynthetically active. As a consequence they... - Show a net uptake of carbon dioxide. Lateral meristems? - Are responsible for secondary growth. What would you normally not find in the root? - Trichomes Xylem Sap mainly contains... - water and minerals What is the difference between 'heartwood' and 'sapwood'? - In contrast to sapwood, heartwood has lost its ability to transport water and minerals. What does the majority of the dry weight of a plant body contains, and where does it come from? - Carbon and air Which of the following statements is correct with respect to 'Osmosis'? - It is the movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration. Which of the following processes likely depends on the activity of a proton pump? - Two of the above: Sugar uptake Uptake of Nitrate If you add 2g of sugar to water, what do you think is happening to the water potential? - It will become more negative. Ion allocation from the soil into the vascular system... - Requires most likely high levels of ATP. Which of the following ions can be difficult to take up for plans based on its charge and interaction with soil? - Potassium