Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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How long would it take a single bacterial cell to form 1,000,000 cells if it had a generation time of 30 minutes?
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- For the state science fair, a student investigated the change in a yeast population over five days. The experimental design included the following. • The yeast were grown on a (5%)glucose (sugar) media in a closed, sterile petri dish for five days. • The petri dish was kept at a constant warm temperature (30°C) in an incubator. • The petri dish was observed under a microscope each day during the study, and the number of live cells in the same area of the petri dish was recorded. • Illustrations of observations were made each day of the investigation. Illustrations of Daily Observations of Growing Yeast Colonies :- Day 1 Day 2 Day 3 Day 4 Day 5 18 Cells 58 Cells 111 Cells 69 Cells 35 Cellsarrow_forwardA researcher illuminated a filament of cyanobacteria with light that passed through a prism, thus exposing different segments of cyanobacteria to different wavelengths of light. He found that all the bacteria in his sample could grow and reproduce in any of the wavelengths of light, but their colors changed throughout the experiment. What can you conclude about this cyanobacteria sample? O More chlorophyll a was produced in response to the light exposure. O The cyanobacteria were dying and were changing color in response. O The cyanobacteria have various photosynthetic pigments to absorb light. O More green photosynthetic pigment was produced to absorb light.arrow_forwardWhich bacterial structure is found internally in the cell? a. plasmid b. cell wall c. flagellum d. capsule e. pilusarrow_forward
- Cathy placed a sample of yeast, a single-celled eukaryotea closed test tube containing a solution of glucose. How will the composition of the air in the test tube change as the yeast interacts with the glucose?arrow_forwardWhat would happen if a group of cells in an organism suddenly began dividing at a higher rate? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a) It does not affect the organism as extra cells can replace damaged cells later. b) it can result in a mass of cells which can lead to cancer c) It provides more energy to the organism d) It makes the organism more activearrow_forwardwhy do unicellular organisms do mitosisarrow_forward
- If you start with one bacterium (generation 0), how many bacteria would you have by generation 6 as a result of binary fission? a) 8 b) 16 c) 32 d) 64arrow_forwardWhich structure completes cytokinesis in bacterial cells? Question 39 options: contractile ring microtubules divide the nucleus tubulin-like proteins separate the cell cell platearrow_forwardDeduce Why is it important to have a isolated colony? Please use your own words when answering, simple and to the point :-) thank uouarrow_forward
- For the following questions referring to cell types and structures, please use the image below for reference. Questions that refer to Cell #1, Cell #2, or Cell #3 are indicating that you should look at the following image to help answer the question. Cell #1 Cell #2 Cell #3 Cell membrane Nucleus - Nucleus DNA Cell Wall Cell Wall Mitochondrion : Cll Mitochondrion membrane Cll Chloroplast membranearrow_forwardHow does the size of the bacteria cell observed compare with the size of the protist cell?arrow_forwardYou are curious to know whether the amount of sugar (food) provided to yeast impacts how much waste gas is produced. To help answer this question, you set up an experiment similar to the one you performed in lab. However, this time, you use four flasks instead of two. In Flask 1 you add 1/4 teaspoon of sugar, in Flask 2 you add 1/2 teaspoon of sugar, in Flask 3 you add 1 teaspoon of sugar, and in Flask 4 you add no sugar. You add 1/2 teaspoon of yeast ("unlabeled sample") and 20 mL of lukewarm water to each flask. You place a balloon on top of each flask. After 30 minutes, you measure the circumference of each balloon to determine how much gas was produced efer back to this experiment to answer questions 1-7. ________________ A) What were the treatment groups in this experiment? B) Which group was the control group?arrow_forward
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