Search: Bacteria

Number of results: 779

genetics/biology
Bacteria Y has a mutation within it’s genome, at gene R, that provides resistance to neomycin. Bacteria Z is sensitive to neomycin, however, when Bacteria Y is placed in a mixture with Bacteria Z, Bacteria Z also gains neomycin resistance. One cell of Bacterium Y ...
Friday, November 7, 2008 at 11:00am by bebe

tofu
does tofu have any naturally occuring bacteria in it? When I incubated the tofu juice, a white bacteria grew, but I can't find any information stating what it might be. It should not have an "natural" bacteria in it. Bacteria are not used in the production ...
Friday, December 1, 2006 at 6:05pm by Christine

Algebra
In a lab experiement, there is a culture that contains 25 bacteria at 2:00. At 2:15 there are 50 bacteria, At 3:15 there are 800 bacteria. What is the conjecture about the rate at which the bacteria increase?
Wednesday, October 3, 2012 at 10:13pm by Carol

Math
In a lab experiment, the count of a bacteria doubles every hour. a)at 1pm, there was 23000 bacteria. How many bacteria will be present at midnight? I can't seem to get the correct answer. The answer is 47 104 000 bacteria. Thanks very much in advance!
Wednesday, January 23, 2013 at 7:25pm by A Canadian

precalculus
A bacteria culture initially contains 1500 bacteria and doubles every half hour. a) Find an expression for the number of bacteria after t hours. Q(t)= b) The number of bacteria after 20 minutes is (the answer must be an integer) c) The number of bacteria after 9 hours is
Wednesday, March 2, 2011 at 1:18pm by josh

Science
Which of the following is NOT true of bacteria? a. Bacteria change the sugar in milk to lactic acid. b. Bacteria change nitrogen into a form plants can use. c. Bacteria change harmful chemicals into harmless ones. d. Bacteria change oxygen into nitrogen.
Friday, February 1, 2013 at 7:20pm by T.J And the Vibe

Calculus
A colony of bacteria is grown under ideal conditions in a laboratory so that the population increases exponentially with time. At the end of 2 hours, there are 4,800 bacteria. At the end of 4 hours, there are 19,00 bacteria. How many bacteria were present initially?
Thursday, January 3, 2013 at 3:24pm by Oj

MATH :)
3. In Biology, it is found that the bacteria in a certain culture double every half-hour. If the initial number of bacteria in culture is 1000, A. Find the defining equation for the number N of bacteria in culture after T hours, assuming that no bacteria die. B. How many ...
Wednesday, May 4, 2011 at 1:34pm by NEED ANSWER URGENT. ANON.

math
A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
Thursday, January 10, 2013 at 6:36pm by Nicholas

Math
A culture of bacteria in a petri dish is doubling every hour. If there are 100 bacteria at time t=0, how many bacteria will there be in 12 hours?
Sunday, November 7, 2010 at 1:37am by Anonymous

math
A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
Wednesday, November 3, 2010 at 6:15pm by Kam

Science
A vaccine can protect you against a disease because it (1)destroys toxic substances from bacteria before they can make you sick\ (2) stimulates your immune system against the pathogens (3) kills any pathogenic bacteria in your body (4) changes pathogenic bacteria into harmless...
Wednesday, May 2, 2012 at 5:37pm by George wang

Math
A certain bacterium divides into 2 bacteria every 20 minutes. If there are four bacteria in the culture now, how many will there be in 4 hours, assuming that no bacteria die?
Monday, March 26, 2012 at 7:27pm by Garz

pre calculus
if there are initial 2500 bacteria in a culture, and the number of bacteria double each hour, the number of bacteria after t hours cab n be found using the formula=N=2500(2^t).how long will it take the culture to grow to 75,000 bacteria.
Friday, December 17, 2010 at 7:58am by john

Calculus
Suppose that a population of bacteria triples every hour and starts with 700 bacteria. (a) Find an expression for the number n of bacteria after t hours. n(t) = ? (b) Estimate the rate of growth of the bacteria population after 1.5 hours. (Round your answer to the nearest ...
Tuesday, November 3, 2009 at 5:21pm by Alex

precal
A petri dish contains only two bacteria. The bacteria divide every half hour. How many bacteria will exist after 3 hours? I thought it'd be 12, but apparently not.
Thursday, September 2, 2010 at 10:41pm by Anonymous

biology
There is a bacteria called botulism which will grow in anaerobic conditions. This bacteria can be found in improperly canned food, as a result a toxin is produced which can be deadly to humans. What does this bacteria have to do with BOTOX?
Wednesday, August 11, 2010 at 5:16am by peter

Physics
On earth, a certain type of bacteria doubles in number every 24 hours. Two cultures of these bacteria are prepared, each consisting initially of one bacterium. One culture is left on earth and the other is put on a rocket travelling at .866c relative to the earth. By the time ...
Wednesday, May 25, 2011 at 11:10pm by Joe Schmo

math
The number of bacteria in a culture is modeled by: n(t) = 1330e^(0.42t) (a) The initial number of bacteria is: (b) The relative rate of growth of this bacterium population is: (c) The number of bacteria after 3 hours is: (d) After how many hours will the number of bacteria ...
Monday, November 19, 2012 at 6:40pm by NotGonnaSay

Algebra 2
If there are initially 1500 bacteria in a culture, and the number of bacteria double each hour, the number of bacteria after t hours can be found using the formula N=1500(2^t). How many bacteria will present after 7 hours? I think the answer is N=192,000. Is this correct?
Thursday, March 1, 2012 at 3:51am by Emily

chemistry
Suppose that you place exactly 100 bacteria into a flask containing nutrients for the bacteria and that you find the following data at 37 °C: TIme (s) number of bacteria 0 100 19 200 38 400 57 800 76 1600 what is the rate order? What is rate constant? how many bacteria ...
Sunday, March 25, 2012 at 8:43pm by HELP PLEASE

calculus
A bacteria culture starts with 900 bacteria and the population doubles every 4 hours. Find an expression for the number of bacteria after t hours.
Friday, November 5, 2010 at 3:07pm by Anonymous

Calc
The number of bacteria in a culture is increasing according to the law of exponential growth. There are 125 bacteria in the culture after 2 hours and 350 bacteria after 4 hours. a) Find the initial population. b) Write an exponential growth model for the bacteria population. ...
Thursday, January 6, 2011 at 9:58pm by Erica

Algebra
The number of bacteria in a stagment pond doubles every hour. A farmer sprays it every two hours and kils 3/4 of bacteria immediately. If there are 10,000 live bacteria left after the farmer sprays at noon, how many live bacteria are there at 11 p.m. that night?
Wednesday, December 12, 2012 at 7:44pm by Jenny

Pre-Calc (exponential growth)
A COLONY OF BACTERIA IS GROWN UNDER IDEAL CONDITIONS IN A LAB SO THAT THE POPULATION INCREASES EXPONENTIALLY WITH TIME. At the end of the three hours, there are 10,000 bacteria. At the end of the 5 hours, there are 40,000 bacteria. How many bacteria were present initially? I ...
Sunday, March 28, 2010 at 6:55pm by Phillip

math modeling
At 3a.m., there is a colony of 736 bacteria, and it is growing at a continuous hourly rate of 10.77%. How many bacteria are there at 7p.m.? Round your answer to the nearest whole number of bacteria.
Tuesday, October 25, 2011 at 4:08pm by math

Math
he number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of bacteria reach 10,000? ...
Saturday, May 12, 2012 at 10:04pm by someone

math
The number of bacteria in a culture is modeled by n(t)=1710e071t (a) The initial number of bacteria is (b) The relative rate of growth of this bacterium population is (c) The number of bacteria after 3 hours is (d) After how many hours will the number of bacteria reach 10,000...
Saturday, May 12, 2012 at 5:20pm by someone

Geometry
Suppose you are studying bacteria in biology class the table shows the number of bacteria after n doubling periods n(periods)[0 1 2 3 4 5] billions of bacteria [3 6 12 24 48 96] your teacher asks you to predict the number of bacteria after 8 doubling periods. what would your ...
Monday, March 8, 2010 at 12:04am by Anonymous

Math
a culture started with 2000 bacteria. after 2 hour , it grew to 2,400 bacteria. predict how many bacteria will be present after 10 hours. round your answer to the nearest whole number.
Sunday, November 7, 2010 at 1:37am by linh

math
I am submitting agian, I am not sure the answer someone gave sounds correct. We are learning about exponents. A type of bacteria reproduces by splitting in two every thirty minutes. How many bacteria will there be after 4 hours if there are 2 bacteria to begin with?
Wednesday, November 3, 2010 at 7:07pm by Kam

math
It takes 28 minutes for a certain bacteria population to double. If there are 4,241,763 bacteria in this population at 1:00 p.m., which of the following is closest to the number of bacteria in millions at 4:30 pm on the same day?
Thursday, September 9, 2010 at 4:33pm by Ross

Math
The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria doubles every minute. (Hint: The answer should contain q as well as n.)
Wednesday, June 9, 2010 at 11:03pm by Mike

math
The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria triples every 30 sec. (Hint: The answer should contain q as well as n.)
Saturday, August 18, 2012 at 11:43am by mary

calculus
2. The rate of change in the number of bacteria in a culture is proportional to the number present. In a certain laboratory experiment, a culture has 10,000 bacterial initially, 20,000 bacteria at time t1 minutes, and 100,000 bacteria at (t1 + 10) minutes. a. In terms of t ...
Friday, March 30, 2012 at 8:35am by naseba

Science
Milk sours quickly because it is almost a perfect medium to grow bacteria. If it is pasteurized, nearly all the bacteria were killed in that process, but some remain, and more likely, the milk can become contaminated with bacteria from the air. Being a near perfect medium to ...
Friday, December 12, 2008 at 8:55pm by bobpursley

algebra
It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day. How long did it take for the bacteria to fill one half of dish?
Monday, January 2, 2012 at 4:34pm by Anonymous

Algebra
It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day, how long did it take for the bacteria to fill one half of dish?
Sunday, January 1, 2012 at 2:45pm by Anonymous

Algebra
It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day. How long did it take for the bacteria to fill one half of dish?
Sunday, January 1, 2012 at 2:45pm by Anonymous

Bacteria
What structural features of bacteria do you think help them to survive? Name four characteristics of bacteria that aid them in producting disease. http://en.wikipedia.org/wiki/Bacteria please read the link and then think about these statements: fast reproductive rate tough ...
Friday, February 23, 2007 at 8:18pm by Sabrina

Algebra 2
A culture started with 2,000 bacteria. After 6 hours, it grew to 2,200 bacteria. Predict how many bacteria will be present after 12 hours. Round to the nearest whole number.
Tuesday, May 7, 2013 at 1:18pm by Kevin

Precalculus
NEED HELP ASAP PLEASE!! A bacteria culture starts with 2000 bacteria and the population doubles every 3 hours. a) A function that models the number of bacteria after t hours is p(t)=____________? b) The number of bacteria present after 5 hours will be about _____ ? c) The ...
Thursday, March 4, 2010 at 6:07pm by jh

Math
I need some help. A biologist finds that the population of a certian type of bacteria double seach half-hour. An initial culture has 60 bacteria. 1. What is the population after 3 hours? 2. How long will it take for the number of bacteria to reach 983,040?
Tuesday, April 9, 2013 at 6:11pm by Kris

Calculus :)
The number of bacteria in a culture is modeled by n(t)=1550e^(0.24t) (a) The initial number of bacteria is _____ (b) The relative rate of growth of this bacterium population is _____ (c) The number of bacteria after 3 hours is _____ (d) After how many hours will the number of ...
Monday, August 22, 2011 at 11:35pm by Brit

Living Environment(please check answers)
1-true 2-false 3-not enough info Transplanting genetic material into bacteria is a simple task- 2 Under certain conditions, bacteria reproduce at a rapid rate-3 The continued use of insulin from animals many cause harmful side effects in some people- 1 The bacteria used in ...
Monday, March 12, 2012 at 6:50pm by Anna

Bacteria
I was growing some bacteria in Petri dishes that I got from wiping my hand with a q-tip. Condensation appeared directly above the bacteria when they got somewhat large. Was this H20 or something else? And why did it form? Humm The products of ellular respiration are water and ...
Sunday, January 14, 2007 at 10:48pm by Sara

Pre Cal
A certain strain of bacteria divides every four hours. If a colony is started with 10 bacteria, then the time t (in hours) required for the colony to grow to N bacteria is given by t = 4(log(N/10)/log2 Find the time required for the colony to grow to one million bacteria. (...
Monday, February 13, 2012 at 11:06pm by Melek

math
A bacteria culture starts with 260 bacteria and grows at a rate proportional to its size. After 4 hours there will be 1040 bacteria. (a) Express the population after t hours as a function of t. this is what i put as my answer but i guess its not right do i replace the four ...
Sunday, November 8, 2009 at 7:59pm by aman

math 12
The bacterium Escherichia coli, or E-coli, has a doubling period of 0.32 h. If a culture starts with 100 bacteria: (a) Determine the equation for the number of bacteria, y, in x hours. b) How many hours will pass before there are 450 bacteria in the culture?
Sunday, May 6, 2012 at 1:18am by saya

Problem Solving math
The amount of bacteria after n min if the initial amount of bacteria is q and the amount of bacteria doubles every minute. I suggest you make a table.Start with 0 time and 1 bug. time #bugs 0&nbsp&nbsp&nbsp&nbsp&sbsp&nbsp&nbsp&nbsp1 1&nbsp&...
Sunday, September 3, 2006 at 10:09pm by Krisy

math problem-
Bacteria grow in a nutrient solution at a rate proportional to the amount present. Initially, there are 250 strands of the bacteria in the solution which grows to 800 strands after seven hours. Find the time needed for the bacteria to grow to 1600 strands.
Saturday, May 12, 2012 at 5:15am by gwapa

Science
a. Bacteria change the sugar in milk to lactic acid. Is true Fermentation. b. Bacteria change nitrogen into a form plants can use. True nitrogen fixation c. Bacteria change harmful chemicals into harmless ones. True Bioremediation d. Bacteria change oxygen into nitrogen. True ...
Friday, February 1, 2013 at 7:20pm by Devron

biology
fungi and bacteria are the two largest groups of primary bacteria.
Tuesday, December 15, 2009 at 3:07pm by bobpursley

Biology-Bacteria
What are the two basic ways that bacteria cause disease? Thanks
Monday, April 14, 2008 at 6:16pm by Sue

medical
If one bacteria will double every 20 minutes, how many bacteria will there be I'm 24 hours
Thursday, October 27, 2011 at 8:17pm by dest

biology
assuming that there are 5 bacteria found in a glass of water. what is the population. of bacteria if it will not be controlled for 6 hours?
Monday, July 11, 2011 at 9:19am by Anonymous

microbio
how large are bacteria? what are the requirements for autoclaving bacteria
Tuesday, October 27, 2009 at 10:18pm by lyne

Biology
List two ways bacteria and blue-green bacteria differ. Any help would be appreciated. :)
Tuesday, March 27, 2012 at 11:07am by Kai :)

science
If I had bacteria that were asexual and bacteria that were sexual in a pond- which would be most likely to survive disease and why?
Saturday, August 21, 2010 at 8:54pm by Anonymous

Please I'm begging someone help me with biology
For starters, they are in completely different kingdoms (fungi are in the kingdom fungi and bacteria are kingdom Monera). Fungi are eukaryotes and bacteria are prokaryotes. Bacteria are single celled; whereas, most fungi are multicellular but some fungi are single celled (like...
Thursday, December 13, 2012 at 7:54pm by kazz

social studies
Isn't the canning process done at high temperatures, so that bacteria and spores cant survive, then sealed with no air? How would bacteria get in and grow?
Monday, January 3, 2011 at 6:58pm by bobpursley

Biology Honours
what's another purpose of staining bacteria besides it being a help to identify groups of bacteria? why are cells counter-stained with safranin?
Monday, March 15, 2010 at 10:51pm by Anonymous

science
The good bacteria eat the bad bacteria keeping them under control so you don't get sick. AND they also help you digest some foods as well.
Sunday, March 30, 2008 at 1:45pm by ~christina~

Biology
You have a flask with 100ml of fresh media. You place 200 bacteria int he flask. Assume that the bacterai were previously growing in the same kind of media and so the lag is 0. If you knew that this species of bacteria has a doubling time of 45 min in these particular conditon...
Sunday, September 23, 2012 at 1:45pm by Anonymous

math 12
the population of a bacteria coleny, p, is doubling every day,d, according to the equation p=2^d. five days later, the population of another bacteria colny, q, is quadrupling everyday,d, according to the equation q=4^d-5. when will the populations of the two bacteria be equal...
Tuesday, December 18, 2012 at 5:01pm by miechelle

math
i have this question the population fucntion of bacteria is observed to be f(t)=C e^2t where C is some constant. if after one hour a scientist abserves the growth rate to be 744 bacteria/hour what was the initial bacteria population. i know that C is the inital bacteria ...
Thursday, October 12, 2006 at 5:26pm by Jessica

Jake1214
Let's say penicillin can kill the bacteria. After using it for 10 years, the bacteria developed resistance to penicillin, so no one is using penicillin anymore because it has no effect. After 15 years, reports have found that most of the bacteria loss the penicillin ...
Wednesday, December 19, 2007 at 2:08pm by Antibotics - Resistance Evolution

precalculas
the amount of bacteria in a petri dish increased by a percent change of 12% each hour over a period of 15 hours. a. find the growth factor for 1 hour? b. by what total percent did the bacteria change during this 15- hour time period.? c. how long will it take for the bacteria ...
Tuesday, March 1, 2011 at 12:28am by katrina

Physics
Time on the rocket goes more slowly, as seen by earth-based observer. The elapsed time on the rocket is lower by a factor sqrt[1-(v/c)^2] = sqrt(0.25) = 1/2 2^8 = 256 is the number of bacteria that are produced on earth during the time interval you are discussing. The rocket&#...
Wednesday, May 25, 2011 at 11:10pm by drwls

Science
What would be the origin of endosporeforming bacteria in pepper and other dried foods such as oregano? and.. How would a high number of endosporeforming bacteria in pepper affect the quality and other prepared and vacuum-packaged ready-to-eat foods? I know what ...
Monday, October 19, 2009 at 11:23am by Andrew

Math
Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth rate per hour. Write ...
Monday, February 21, 2011 at 4:16pm by Rachal

Math
Bacteria experiences exponential growth, increasing 17% every hour. If there are 800 bacteria now, in how many hours will there be 2000? How would I go about this problem?
Monday, August 1, 2011 at 7:30pm by Meghan

science
Some types of soil bacteria can form the nitrogen compounds that plants need. This is known as........... fixation bacteria. There are many kinds of them. THe most important belong to the genus Rhizobium
Friday, March 30, 2007 at 3:22pm by Hillary

Algebra
The number of bacteria in a certain population increases according to an exponential growth model, with a growth rate of 11% per hour. An initial sample is obtained from this population, and after four hours, the sample has grown to 4130 bacteria. Find the number of bacteria ...
Thursday, February 3, 2011 at 7:13pm by Rachal

Math
A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note that: A linear ...
Tuesday, October 25, 2011 at 11:54pm by Matt

Math
I'm not sure how to do this question 7. The growth of bacteria in culture can be described by the equation N1 = N0e' where N is the number of bactena at any time t, No is the initial number of bacteria, and k is a constant. The time taken for growth to double the ...
Tuesday, December 15, 2009 at 7:55am by amelia

Pre-Calculus
The population of a particular type of bacteria doubles in number every 12 hours. a)if there are 8 bcteria initially, write an equation that models the number of bacteria present after x 12 hours. b)How many bacteria will be present after 5 days? by using this formula N(t)=N0(...
Monday, December 21, 2009 at 12:34am by Amy

English
1) OK 2) In particular, we prepared a genetically modified bacteria, the ..., which can survive using arsenic instead of phosphorous in building its DNA. 3) Actually, it contains a recombined plasmid in which we inserted the necessary sequences to interrupt the pathogenic ...
Wednesday, February 15, 2012 at 10:10am by Writeacher

Math- Alg 2
A colony of bacteria is growing exponentially according to the function below, where T is in hours. How many bacteria are there after 7 hours? B(T)= 4*e^(0.8)T
Thursday, January 26, 2012 at 10:52pm by Karen

Science
When an antibiotic is used, some of the bacteria may be more able to survive it than others. The more-resistant bacteria survive to reproduce and pass their resistant genes to the next generation. The less-resistant bacteria don't get the chance to reproduce. Therefore, ...
Wednesday, February 4, 2009 at 6:02pm by Noether

Chemistry
concn of bacteria in tube A = 1,000,000,000 per 10 mL or 1E9/10 = 1E8 = 100,000,000/mL. That's the concn (if you want it quoted in bacteria/mL) and the number of bacteria is the same since you put 1 mL in
Tuesday, November 27, 2012 at 6:45pm by DrBob222

Grade 12 Math-Urgent!
Bacteria have a doubling time of roughly 10 hours. A normal bacteria starting population would be approximately 10,000 bacteria per ml of fluid...I am not sure if I have done these questions correctly and would like some confirmation before I hand this in to be marked! a.) ...
Wednesday, January 9, 2008 at 9:34pm by Math genius! Urgent!

Calculus
A bacteria culture contains 200 cells initially and grows at a rate proportional to its size. After half an hour the population has increased to 360 cells. (a) Find the number of bacteria after t hours. (b) Find the number of bacteria after 4 hours. I found part a, P(t)= 200e...
Tuesday, December 11, 2012 at 4:18am by toma

Science
A species of bacteria in a laboratory undergoes exponential growth, reproducing every 30 minutes. Starting with one bacteria cell, how many bacterial cells will there be after 3 hours? Would the answer be 64? Thanks
Thursday, September 29, 2011 at 7:38pm by Shadow

math
The population of a slow growing bacterial culture can be represented by the function P(t)=t^2-0.7t+10, where t is measured in seconds. a) Determine the populations of bacteria at 2.5 seconds. b) Determine the average rate of change in the bacteria population over the interval...
Saturday, February 2, 2013 at 7:39pm by Anonymous

Science
My science fair project is growing bacteria from food that is left out and seeing how much the bacteria increases over time. How would I write my hypothesis?
Tuesday, March 19, 2013 at 11:15pm by Abby

calculus
a bacteria pop. grows exponentially. There are 1500 bacteria after 3 hours and 20,000 after 8 hours. ahving trouble finding the initial bacteria pop. thanks for the help In five hours the population get's larger by a factor 13 + 1/3-----> N(t) = N_0 * (13 + 1/3)^(t/...
Thursday, February 15, 2007 at 9:35am by Jake

statistics
An experiment with results acquired showed that at the beginning the temperature was 20 degrees and the size of bacteria was 1 mm long. 12 hours later the temperature was 56 degrees and the size of the bacteria was 12 mm long. Create a graph showing the size of the bacteria ...
Wednesday, November 24, 2010 at 8:41pm by Anonymous

Science
I was growing some bacteria in Petri dishes that I got from wiping my hand with a q-tip. Condensation appeared directly above the bacteria when they got somewhat large. Was this H20 or something else? And why did it form?
Sunday, January 14, 2007 at 2:34am by Me

Science
Thank you for using the Jiskha Homework Help Forum. You might begin here: 1. http://en.wikipedia.org/wiki/Bacteria 2. http://www.ucmp.berkeley.edu/bacteria/bacteria.html 3. http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Eubacteria.html Sra
Monday, September 1, 2008 at 5:50pm by SraJMcGin

Life orientation
Littering is one of the effect because,the wastage you dump on the environment come up with some germs and when the air come along,it flushes the bacteria and we therefore in hail that bacteria.
Monday, July 18, 2011 at 10:44pm by Malefa Gladys Tshabalala

Math Word Problem
At 6am a few bacteria fall into a can of syrup in a broken garbage bag. The conditions of warmth, moisture, and food are perfect for growth and the population doubles every 20 minutes. By 6pm the bacteria are overcrowded and dry and their food is gone.At what time does the ...
Sunday, November 9, 2008 at 1:57pm by George

Biology
Hey guys! I'm thinking that B is the correct answer, but doesn't the DNA that is going to be inserted into the vector complementary to the mRNA strand? Would appreciate some help! Which one of the following is the biggest challenge that must be overcome in order to get...
Saturday, November 29, 2008 at 8:27pm by Angela

biology
Would you expect the fraction of bacteria that are spontaneous rifampin resistant mutants to be higher or lower in a culture that: you had propagated many times or one you had just started from a single colony of sensitive bacteria? Why?
Sunday, October 23, 2011 at 4:45pm by AKASHA

Biology
bacteria do not contain phycocyanin and phycoerythrin but BGA contains these pigments and bacteria posses lomasomes and plasmid but BGA donot posses these
Tuesday, March 27, 2012 at 11:07am by ramannachowdary

Math
A culture contains 12,000 bacteria. After an hour the count is 25,000. Find the number of bacteria after 3 hours.
Thursday, November 15, 2012 at 9:05pm by Leyla

alg2\trig
a colony of 300 bacteria doubles each day. write an explicit formula to determine how many bacteria there would be on the nth day. how would you do this?
Tuesday, January 31, 2012 at 8:09pm by jessica

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