Recent Homework Questions About Biology
dont even know where to start You prepared a 10-fold dilution of a culture out to 10-9. You initially estimated there were between 3 x 108 cells/ml and 5 x 109 cells/ml in the original cell suspension. Which tube dilutions would you plate to ensure you captured significant ...
Monday, October 27, 2014 at 12:16am
You carried out a 10-fold dilution series. You started with tube 0 which contained an overnight culture of E. coli. You estimated the original culture contained 6 x 108 cell/ml using McFarland nephlemeter standards. You plated 0.1 ml volumes of a number of the dilutions. Which...
Monday, October 27, 2014 at 12:15am
1. Mitochondria and chloroplasts reproduce the same way free-living bacteria doby _____________. My answer: Binary fission. 2. The tropism that allows seedlings to find their way out of the soil and into the sunlight is _________________. My answer: Positive tropism. &...
Thursday, October 23, 2014 at 4:44pm
Should I take psychology before sociology or take sociology before psychology. Like saying "You can't do well in chemistry unless you finish biology"
Wednesday, October 22, 2014 at 6:34pm
Which of the following is/are true about where electrons end up? The last molecule of the ETC in the mitochondrian donates electrons to water and releases oxygen The last molecule of the ETC in the mitochondrion donates electrons to oxygen and makes water NADH and FADH2 ...
Wednesday, October 22, 2014 at 2:04pm
Fermentation: (Select all that are true) Uses pyruvate to accept electrons Uses pyruvate to donate electrons Regenerates NADH Regenerates NAD+ Directly makes ATP Allows glycolysis to continue in the cytoplasm making ATP Allows oxidative phosphorylation to continue int he ...
Wednesday, October 22, 2014 at 2:01pm
A couple has a child with an autosomal recessive form of glycogen storage disease, a deficiency of a lysosomal enzyme. An enlarged liver and heart and weak muscles cause the baby to die from heart and lung failure at 20 months. Now the woman is pregnant again. Her doctor ...
Tuesday, October 21, 2014 at 9:55pm
Why is it important that cells produced after meiosis be diverse? My answer: Meiosis is involved it the formation of gametes, so if the cells produces were not different, then everyone would be identical. Is this correct? @Mrs. Sue? someone? Thank you! :)
Tuesday, October 21, 2014 at 12:59pm
If at noon today someone has 1 E. coli cell, in their gut/large intestine, and E. Coli does binary fission, in unison each thirty minutes, how many will one have in their gut at 11:55 A.M. tomorrow? (five minutes short of a whole day) I'm confused on how to begin setting ...
Monday, October 20, 2014 at 1:42am
Yogurt contains fats, cholesterols, carbohydrates(fibre, sugar and starch) and protein. For each of the nutrients that this food contains: Explain how the molecule's structure fits it function?
Monday, October 20, 2014 at 1:35am
Biology check my answers
Please check to see if my answers are right: we need to list the 6 kingdoms with their characteristics and an example each Eubacteria -"true bacteria": bacilli Monera- prokaryote ,: Cyanobacteria Protista- single cell, true nucleus :amoeba Plantae- photosynthetic :...
Saturday, October 18, 2014 at 7:31pm
Part A. Making Visual Connections with the Textbook (5 points) You can answer these in a Word document, indicating the question number followed by your answer. Below is the Absorption Spectrum of Photosynthesis. As your textbook explains, plants have a number of light-...
Friday, October 17, 2014 at 11:11pm
In a group of 200 high school students, 36 are taking biology, 52 are taking Spanish, and 126 are taking neither biology nor Spanish. If one of these 200 students is to be chosen at random, what is the probability that the student chosen is taking biology but not Spanish?
Sunday, October 12, 2014 at 4:03pm
I need help with the life cycle of an ostrich! And what could go wrong with the development. I don't understand if it's bacterial or viral infections that may occur...
Thursday, October 9, 2014 at 6:29pm
Aquatic organisms: A. have a waxy coating to prevent water loss B. may experience problems with water balance C. typically have a plentiful supply of nitrogen. D. never find light to be in short supply
Thursday, October 9, 2014 at 11:08am
A 50 year old male who is not overweight and has normal blood cholesterol levels suffers a heart attack. Propose a possible explanation i think the answer would be genetics...
Wednesday, October 1, 2014 at 5:05pm
_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.
Tuesday, September 30, 2014 at 5:25pm
Julie took her lunch to work every day. She wanted to know what type of insulation would keep her lunch the coolest. Each day, she took her lunch in a different container: a Styrofoam cooler box, a plastic cooler box and a soft insulated lunch bag. She measured the temperature...
Tuesday, September 30, 2014 at 2:43pm
Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A - A eukaryotic cell is like a college campus was a prokaryotic cell is like a one-room schoolhouse B - A eukaryotic cell is like a flip phone while a prokaryotic ...
Sunday, September 28, 2014 at 7:39pm
What is the water potential of a 5.7 L water in which 2.1 moles of NaCl has been dissolved at 30 degrees celcisus? Help please? Can you show work as well? It'll be greatly appreciated. Thanks in advance.
Saturday, September 27, 2014 at 8:04pm
The following statement is false. Select the rewording that makes the statement true. Dalton discovered electrons inside of atoms by using thermal energy. Thompson discovered electrons inside of atoms by using cathode rays. Thompson discovered electrons inside of atoms by ...
Friday, September 26, 2014 at 4:21pm
Biology question plz
Which of the following depends on bacteria? conversion of dead organic matter to fossil fuel photosynthesis dissolution nitrogen fixation I think its A but I feel it could also be D, could you plz help?
Friday, September 26, 2014 at 12:18am
Describe the relationship between ATP and ADP and the importance of this relationship within a cell. My answer: ATP stands for Adenosine Tri-Phosphate, and is the energy used by an organism in its daily operations. It consists of an adenosine molecule and three inorganic ...
Monday, September 22, 2014 at 12:45pm
What ABO antigens are present on the red blood cells of Mr. Green's blood? Mr. Green Anti A serum - no clump Anti B serum - clump Anti Rh serum - no clump
Saturday, September 20, 2014 at 8:50pm
A true breeding brown mouse is mated with a true-breeding white mouse and all their offspring are brown. If two of these brown offspring are mated, what percentage of the F1 and F2 generations will be brown?
Thursday, September 18, 2014 at 3:09pm
Which of the following would NOT likely have occurred without the evolution of photosynthetic organisms? A. Life would be much less diverse. B. Most organisms would have gone extinct due to the increase in oxygen. C. Mitochondria-containing cells would not have evolved. D. ...
Tuesday, September 16, 2014 at 10:28pm
Put the following in the correct order. Report results Determine if hypothesis is true Do background research Construct a hypothesis Collect data Analyze results and draw conclusions Design and implement an experiment State the problem / ask questions Correct Order State the ...
Tuesday, September 16, 2014 at 7:31pm
The function of a protein is determined by its ? Answer: shape The shape of a protein is determined by the ? of its ? ? First answer : ? Second two answers : primary structure
Monday, September 15, 2014 at 11:25pm
A Biology student wants to know if Mountain Dew will make plants grow faster than water. As a Chemistry student, you have agreed to assist in the planning of the experiment to make sure the student designs a valid experiment. 1) What is the experimental question? 2) What is ...
Monday, September 15, 2014 at 3:33pm
Describe how you would prepare 90 mL of a 5 mM NaCl solution from a 2 M NaCl stock solution. Describe your actionsexactly what you would do step-by-stepwhen preparing this solution. Also show all calculations. Be sure all amounts include units of measurement.
Sunday, September 14, 2014 at 12:46am
A student wishes to prepare 300 mL of 0.25 M sucrose. He puts 25.7 g of sucrose in a beaker and then adds 300 mL of dH2O. The total volume of the solution after the sucrose has been dissolved is 330 mL. a) What did he do wrong when preparing his solution? b) What is the actual...
Sunday, September 14, 2014 at 12:44am
A company seeks to develop an herbicide that kills plants by directly interfering (at the cellular level) with plants ability to maintain turgor pressure. An herbicide could accomplish this by disrupting the membrane of _____.
Friday, September 12, 2014 at 2:22pm
Science - Please Check My Four Answers
Please help me with the following questions: 1. Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think the ...
Thursday, September 11, 2014 at 5:43pm
Science - Please Check My Answers
Please help me with the following: Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think the answer is B. ...
Thursday, September 11, 2014 at 3:52pm
jordan is doing a science fair project on the effect of music on the growth of tomatoes. he has two tomato plants, plant A and B, that he grows in a window and gives the same amount of water. plant A is exposed to classical music using headphones attached to the soil. ...
Wednesday, September 10, 2014 at 7:14pm