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Microbial Physiology
Microbial physiology is the branch of microbiology that is associated with studying the physiology of fungi, bacteria, and viruses. It is an important field of science concerning functional genomics and metabolic engineering.
Chemotaxis
The organism’s movement in a particular direction as a response to certain chemicals that are available in the environment is defined as chemotaxis. In brief, it can be defined as the occurrence of an organism’s movement in response to a certain chemical stimulus.
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- Next, the researcher wanted to determine if the timing of the flash of ight, whether It was early or late into the dark perlod, had an affect on the flowering plants. The researcher exposed Xanthlum strumarlum plants to a cycle of 12 hours light/12 hours dark and exposed the plants to a 10 minute burst of light at different times within the dark perlod. She recorded the percent of flowering plants post exposure. The data is in the chart below. 6. What conclusions can you draw from this data? (You do not need to show a graph, but it may help with your answer.) * % of plants flowering Time of burst of light (from the beginning of dark period) 100 86 35 41 10 78 12 95 21 4- 8.a botanist wants to see how different colored light waves influence the growth of pea plants. she puts the same number of seeds into three identical pots with the same kind and amount of soil. she then gives them the same amount of water every 3 days for the length of the experiment. one pot is placed into a dark windowless closet. another part is left on the window sill, and the third is placed under a lamp with a green bulb. she records the height of each plant every day for 3 months what is the independent variable in this experiment.How does copper contamination in soil affect plant growth in an endangered plant?You haveOne greenhouse with three tables100 seeds (10 each from 10 plants: assume each seed is viable)unlimited pots, soil, copper, etc.ConsiderHow will you set up your experiment?How many samples (per treatment, per measurement)?What will you measure (leaf area, number of leaves, shoot height, shoot biomass)?
- Select all of the statements that are true about CAM plants. And select the plant that is an example of a CAM plant. The options are in the photo. A scientist is studying the effect a new fertilizer has on root growth on bean seedlings. Three groups of plants are grown in the same location in a greenhouse, each receiving the same amount of sunlight and water every day. The scientist measures the length of the roots for each plant every day. The scientist then calculates the mean for each group for five days. The results are shown in the following table. Fertilizer Experiment Data Table Which are the controlled variables in this experiment? Select all that apply. A B Day 1 Day 2 Day 3 Day 4 Day 5 с D Group 1 0 mg 3.0 cm 3.2 cm 3.4 cm 3.7 cm 4.2 cm the number of days the experiment lasted the amount of fertilizer each plant was given the location the plants were grown in the type of fertilizer used by the scientist Group 2 5 mg 2.7 cm 3.1 cm 3.7 cm 4.2 cm 4.6 cm Group 3 10 mg 2.9 cm 3.3 cm 3.7 cm 3.9 cm 4.1 cmPruning results in a greater photosynthetic area and therefore lesser foods are manufactured? True or False
- Design and describe an experiment using celery stalks to demonstrate how certain conditions will cause a loss or gain of turgor pressure. In order to follow the scientific method, your description should start with an observation and be followed by: a testable hypothesis, an outline of the experiment that will test the hypothesis, a description of the type of data that will be collected, and a possible conclusion that could likely be made after completing the experiment and analyzing the data.A team of researchers investigated the effects of phosphorous availability and light intensity on an angiosperm species. Seeds of the angiosperm were divided into four equal groups. Groups 1 and 2 were exposed to 200 pmol, and Groups 3 and 4 were exposed to 500 umol. Groups 2 and 4 also received a phosphorous (P) solution. After 20 days, all plants were weighed, and the average dry weight of each group was calculated. The results are in the table below. Group 1(200 pmol, Group 2(200 umol, Group 3 (500 umol, Group 4 (500 pmol no P) no P) +P) Average Dry weight (g) Describe the effects of light and phosphorous on the growth of the plants in this study. Explain how the metabolic processes associated with the plant kingdom likely influenced these results. 10.8 1.5 6.2Watch the suggested videos for Plants Response to Stimuli. a. GeotropismGeotropism Experiment (2:48 minutes)https://www.youtube.com/watch?v=AEo5UsPeB5gb. PhototropismPhototropism Experiment (2:16 minutes)https://www.youtube.com/watch?v=WZ1NRP3OF5w a. For each experimental set up (geotropism and phototropism), identify the dependent and independent variables that have contributed to how plants responded to the stimuli.
- he seedling becomes erect. You record a drop of 0.54 ml in the pipet. Is this an accurate measurement of the volume of water transpired by the plant? Explain your answer Shewen cucerite measurement becuse thir lab har Ccmpare ble eperimant and . Cur empiremental pMond elhing wet in mue strel onol would eguie mere of a Werter updake; this eapleme why pat Kod a 0.54 ml drop wear pluced in a und treatimant are the overale water lou wou 0 - A 1-hectare field contains 2500 bean plants with a total surface area of 557 m2. Ambient temperature is 21°C, winds are calm and humidity is 45%. If each plant is transpiring at the rate you calculated for ambient/normal conditions how many liters of water is lost from the field each hour due to transpiration? Show your calculation below. rate = 014 mi /30 minA short-day plant flowers only when exposed to light for less than 12 hours long. Which of the following would cause the plant to flower? * O a 13-hour night and 11-hour day with 1 minute of darkness after 6 hours a 12-hour day and 12-hour night with a flash of red light an 8-hour day and 16-hour night with a flash of white light after 8 hours O a 9-hour night and 15-hour day with 1 minute of darkness after 7 hours 24 hours of continuous lighthorticulturist wants to grow large, healthy plants by maximizing the rate of photosynthesis. Which of the following actions would be most likely to give the results she wants? *