Caroline Pucko Biology 1108 Exam 1 Powerpoint Questions and Notes NEW QUESTION Scientists found that tephra in the pumice plain was almost lacking nitrate and ammonium but also found it almost devoid of carbon Could this be the reason that plants are unable to initially grow in this area Yes a lack of carbon in the soil would have prevented protein synthesis No plants don t need carbon No plants need carbon for carbohydrate synthesis but they don t get it from the soil Yes plants need carbon for carbohydrates like cellulose and glucose Yes they need C from the soil to make sugar in photosynthesis ANSWER No plants need carbon for carbohydrate synthesis but they don t get it from the soil NEW QUESTION What is the relationship between seeds produced per parent fecundity and per capita seedling survivorship ANSWER The higher the fecundity the lower the survivorship NEW QUESTION In Kenya wildlife physiologists have observed a new trait in cheetahs Some cheetahs are being born with extra long legs which allows them increase their hunting success rate This allows them to live up to 20 years typical lifespan is usually between 12 and 15 years However the offspring of these long legged cheetah are sterile and are unable to pass on their genes As a result this long legged mutation the fitness of long legged individuals increases decreases has no effect on ANSWER decreases NEW QUESTION A plant that lives in a very dry place where suitable conditions for germination happen infrequently can be a long time before germination would most likely have evolved to have a seed coat and a cotyledon germination is when a seed starts to sprout thick large thin small thick small thin large ANSWER thick large NEW QUESTION Evolutionary tradeoffs explain why large seeded plants produce a relatively high number of seeds small seeded plants produce lots of seeds plants migrate slower than animals small seeded plants have fewer offspring that survive than large seeded plants large seeded plants have a higher evolutionary fitness ANSWER small seeded plants produce lots of seeds NEW QUESTION A thick hard seed coat is a disadvantage because it prevents germination it costs a lot of energy to create it makes it less likely to be eaten by an animal and dispersed it prevents water from getting into the seeds ANSWER it costs a lot of energy to create NEW QUESTION Carrie has been spending more time than she should trying to start a vegetable garden and she has planted a bunch of basil in planters outside on her porch The basil grew to be about 5 inches tall with a single set of leaves and then stopped growing She did a soil test and found no free N for the plants to take up They are nitrogen starved She then added a good amount of nitrogen to the soil fully expecting the plants to shoot up so that there could be pesto in the near future But the plants grew a tiny bit but then didn t grow any taller or put on any more leaves A second soil test showed plenty of available N in the soil Based on Liebig s Law of the Minimum what is the most likely explanation for this Plants don t need N from the soil they take it out of the air The plants must have been running out of space Too much N in soil The basil had enough N but needed a different nutrient instead ANSWER The basil had enough N but needed a different nutrient instead NEW QUESTION Liebig s Law of the Minimum ANSWER law stating that a population increases until the supply of the most limiting resource prevents it from increasing further NEW QUESTION Maple syrup is made from the sap of sugar maple trees In Vermont syrup producers tend their maple forests called sugarbushes One of these farmers Mr Bennington noticed his trees hadn t produced any syrup last spring so he set out to improve his crop by fertilizing the forest with Calcium This year the northern part of his sugarbush has been producing syrup but the southern part still hasn t Based on these results and Liebig s Law of the Minimum which statements MUST be true Select all that apply The southern forest is not Ca limited The northern forest was Ca limited We do not know what limited the northern forest last year The southern forest is N limited instead of Ca limited Northern forest maple trees will continue producing syrup until they run out of Ca again The whole forest was Ca limited last spring ANSWER The southern forest is not Ca limited The northern forest was Ca limited NEW QUESTION Which one s of these experiments indicate definitively that the tomatoes were limited by potassium K select all that apply The tomato plant grew when it was given K fertilizer The tomato plants did not grow with the addition of P and N fertilizer The tomato plant that was watered more often grew taller When micronutrients were added the tomato plants grew ANSWER The tomato plant grew when it was given K fertilizer NEW QUESTION Why don t small seeds have high per capita survivorship All small seeds are dispersed by the wind There are so many of them that they end up competing against one another for resources They have very small energy reserves so they have to land in a spot where they can quickly access all the nutrients they need or they will die They are much more likely to get eaten by animals so most of them die before they are able to germinate They have thin seed coats that make them vulnerable to environmental conditions like drought or cold ANSWER They have very small energy reserves so they have to land in a spot where they can quickly access all the nutrients they need or they will die NEW QUESTION Which of these statements are TRUE regarding the Mount St Helens landscape following the eruption of 1980 Select all that apply The tephra deposited by the volcano contains many of the necessary nutrients for plants The southern slopes of Mount St Helens were barely impacted by the eruption The pumice plain is a relatively small fraction of the total affected landscape There were no organisms above ground in any part of the affected area that survived the blast The pumice plain contained only lupine immediately following the eruption ANSWER The tephra deposited by the volcano contains many of the necessary nutrients for plants The southern slopes of Mount St Helens were barely impacted by the eruption The pumice plain is a relatively small fraction of the total affected landscape NEW QUESTION Which species found in the area surrounding MSH will likely be the last to reach the interior of the pumice plain You can use the