Answer: the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3
Explanation:
We know that; Gram negative bacteria looks pale reddish in color under a light microscope from Gram staining.
therefore
There are 30 red bacterial colonies counted.
1 mL of from tube 1 was removed and added to tube with 99 mL saline (tube 2) dilution is 1/100.
transferred volume into the plate is 1 mL.
Now, we have to determine the cfu/g Gram-negative bacteria in the fecal sample
Formula to calculate CFU/g bacteria in fecal sample is expressed as;
C = n/(s×d )
where C is concentration (CFU/g)
, n is number of colonies
, s is volume transferred to plate
, d is dilution factor.
so we substitute
C = 30 / ((1/100) × 1)
C = 30 / 0.01
C = 3000
C = 3.0 × 10^3
THERFERE, the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3
Nutrients enter a cell with the concentration gradient by the process of diffusion.
I hope this helps!
Answer:
The human eye does not rotate, nor does it turn in search of sunlight to form a power source.
The human eye contracts its pupillary structure in order to collimate or select the rays of light that enter the eye, while the plant cannot make a selection or filtering of solar rays.
The human eye has three different types of cones and plants do not have the cone system.
Plants can absorb sunlight and rotate toward the beam up to 360 degrees while the human eye cannot.
Explanation:
The comparison between the human eye and this type of plants at the time of solar irradiation presents many differences, but the most important thing of all is that the human eye can regulate the entry of irradiation while the plants rotate towards where the ray of the sun but they cannot regulate how much sun they perceive by means of a filtering such as the contraction of the cornea
cancer cells are the cells that divide relentlessly forming solid tumors or flooding the blood with abnormal cells
whereas the NORMAL CELLS are the cells which listen to signals of the neighbouring cells and stop growing when enroach on nearby tissues
