E.coli bacteria reproduce every 20 minutes. Which of the following best supports why the earth is not taken ov

Question

E.coli bacteria reproduce every 20 minutes. Which of the following best supports why the earth is not taken over by E. coli?

Limiting factors like space and food effect the carrying capacity.

Other bacteria are decomposing the E. coli at a faster rate.

The bacteria die faster than then reproduce.

none of the above

Answer 1

I don' t think the answer is that they die faster than they reproduce. If that were so, there would be NO bacteria.

Actually the death to growth ratio is variable. There must be times when they reproduce faster, and times when they die faster.

I think the answer is limiting factors. When the bacteria reach a new substrate, they grow rapidly (faster than they die) until they have overpopulated the media and begin to slow in growth until they die faster than reproduce.

The moisture, light, and temperature have to be just right for each type of bacteria to grow. We know that the earth varies widely in these three variables, so most of the earth is not suitable for bacterial growth. Places where they can grow are found in isolated patches. When bacteria reach the end of their isololated space, growth must stop until a new space is found.

Answer 2

I know from experience with differential equations that it is most likely the limitnig factors. In differential equations intended to accurately model populations, there is often a term included called the carrying capacity. The carrying capacity is the maximum number of "things" that any given environment can support at one point.

Answer 3

Next time you get a problem like, a quick way to do it is the exponential growth formula. x=a*b^t/tau where a=initial population (1) b=rate of growth (in this case it doubles, so 2) t=amount of time (3 hours) tau= time constant (how long it takes for the growth to occur, here its 20 min) so x=1*2^180/20 =512

Answer 4

It is DEFINITELY the limiting factors.

Limiting factors include all factors that hold down the population growth: space, food, and buildup of waste products in particular, though viruses, pollution, predators, interspecies competition, and other factors come into play in a natural ecosystem.

Answer 5

i think it is


The bacteria die faster than then reproduce.

Answer 6

its the limiting factors