Question

bacteria that grow in mine drainage at ph 1 - 2 are probably which of the following? obligate anaerobes neutrophiles acidophiles alkaliphiles question 9 (1 point) if a culture starts with 50 cells, how many cells will be present after five generations with no cell death? 1600 200 300 64000

Explanation:

Question 1

Acidophiles are organisms that thrive in acidic environments with a low pH. The pH of 1 - 2 in mine drainage indicates an acidic condition, so bacteria growing there are likely acidophiles. Obligate anaerobes relate to oxygen - requirement, neutrophiles prefer neutral pH, and alkaliphiles prefer high pH.

Step1: Recall the cell - growth formula

The number of cells $N$ after $n$ generations starting with an initial number of cells $N_0$ is given by $N = N_0\times2^n$.

Step2: Identify the values of $N_0$ and $n$

Here, $N_0 = 50$ and $n = 5$.

Step3: Calculate the number of cells

$N=50\times2^5=50\times32 = 1600$.

Answer:

C. acidophiles

Question 2