An undergraduate student is working in a research lab, and starting with a single bacterium, she cultures it in a flask of ideal nutrient broth at an optimum temperature over a two-hour period. Assume resources do not become limiting over this time frame. What figure best describes the predicted population trajectory during the experiment. Time Time Population size Population size
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- You add 7 paramecia to a test tube and feed them bacteria. One week later the population has grown to 18. Assuming that the population is growing exponentially, how many paramecia can you expect after 10 weeks? Round your answer to the closest full number. Your Answer:An exponentially growing bacterial population increases its number from 10³ and reached 10¹ cells in 8.5 hours How long will it take for the population to reach 10¹8 cells? 19.5 hours 10.5 hours 11.5 hours 12.5 hours Lacks information, cannot be determined NextThe sheep liver fluke is an organism that lives in the intestines, liver, brain, and lungs of sheep and causes tissue damage in these organs. Which symbiotic relationship describes infestation of sheep liver flukes on a sheep population? Select one: a. b. Commensalism. C. Mutualism. d. Preditor-prey. Parasitism. O O O O
- Assuming the original 10 organisms grew exponentially, doubling in size with every unit of time, calculate the population size from t0 to t4 and draw the position of this curve on your graph. Adjust your figure legend.Assuming the original 10 organisms grew exponentially, doubling in size with every unit of time, calculate the population size from t0 to t4Bacteria reproduce by fission (splitting in two) and can respond very rapidly to environmental changes. A culture of bacteria is found to contain 4.95 X 109 bacteria and the carrying capacity of the culture is 5.0 X 109. How will the bacterial population change in the near future. Group of answer choices -it will increase very rapidly to K -it will increase very slowly to K -it will grow exponentiall -it will decrease very rapidly to K
- You are studying the population dynamics of an algae species that recently invaded a lake. You measured the amount of algae in the lake the time of the invasion and then for six years afterward (shown in green dots below). You also conducted experiments showing there are enough nutrients entering this lake to support a population density of 200 cells per mm- of algae, marked below as a dashed orange line labeled K. Based on your data, you want to predict how large the algae population will be in the future, assuming no major environmental fluctuations. Here, population density can be modeled in the same manner as population size. 1. what would you assume the algae population density will be 20 additional years in the future, assuming no environmental changes occur? __cells/mm^2Quadrat sampling is a method by which organisms in a certain proportion (sample) of the habitat are counted directly. As with all sampling methods, it is used to estimate population parameters when the organisms present are too numerous to count in total. It can be used to estimate population abundance (number), density, frequency of occurrence, and distribution. Quadrats may be used without a transect when studying a relatively uniform habitat. In this case, the quadrat positions are chosen randomly using a random number table. The general procedure is to count all the individuals (or estimate their percentage cover) in a number of quadrats of known size and to use this information to work out the abundance or percentage cover value for the whole area. The number of quadrats used and their size should be appropriate to the type of organism involved (e.g. grass vs tree). Estimated average density Total number of individuals counted Number of quadrats X area of each quadrat Guidelines…The three microbial species shown in the graph where all treated at 70° C. When we have to sterilize a food product that contained 107 bacteria, the time taken for each bacterial species would be:- For species A :- 42 minutes For species B :- 70 minutes For species C :- 112 minutes arrow_forward Step 3 The D70 values for these three bacterial populations. D70 for microbial species A= 42 minutes B: D70 microbial species B= 70 minutes C: D70 microbial species C =112 minutes Please answer these questions below: please use drawings too (i learn best that way) For the next three questions, assume D90 = 22 minutes. At what temperature will you treat a food product? How long does it take you to kill 90% of bacteria? How long will it take you to sterilize a food product if it had 109 bacteria on it?
- Which of the following organisms will have the most generations after 4 hrs, if their generation times are the following? How many generations will arise for the organism that gave the most generations? Organism A = 15 mins Organism B = 0.25 hr Organism C = 0.15 hr Organism D = 40 minsAssume a population of desert tortoises has a per capita growth rate (r) or 0.039. If this rate could be sustained, how long would it take for the population that is currently 186 individuals to reach 450 individuals? (just give the simplest expression with the data provided). Edit View Insert Format Tools Table 12pt Paragraph BIU AT²In biological control method,one living organisms is used against another to check its uncontrolled growth.which kind of population interaction is involved?