Answer:
- Physical and chemical barriers
- non-specific innate responses
- specific adaptive responses
<u>The differences are...</u>
The first barrier is the physical and chemical barrier. It is the first line of defense when in contact with outside sources, this can be through the skin, earwax, nose-hair, etc.
The second barrier, the non-specific innate response, is after these outside sources have somehow managed to pass through the first barrier. They come into contact with cells and enzymes that help to defeat them.
The third barrier, the specific adaptive response, is the body's way of dealing with pathogens that the body has encountered before. (B cells activate)
There are several information's of immense importance already given in the question. Based on those information's the answer can be easily deduced.
Initial number of bacteria in the culture = 1000
Number of bacteria after t hours = 1000 (2)^t
Then
1000 (2)^t = 50000
2 ^t = 50
t = 5.6
I hope the procedure is clear enough for you to understand.

<u>Aerobic </u><u>respiration </u>:- Aerobic respiration is process of respiration in which complete oxidation of glucose takes place in the presence of oxygen
<u>That </u><u>is</u><u>, </u>
<u>Aerobic </u><u>respiration </u><u>is </u><u>takes </u><u>place </u><u>in </u><u>four </u><u>stages </u><u>:</u><u>-</u>
- <u>Glycolysis</u>
- <u>The </u><u>link </u><u>reaction </u>
- <u>The </u><u>Krebs </u><u>cycle </u>
- <u>Oxidative </u><u>phosphorylation </u>
In aerobic respiration, Glucose with 6 carbon atoms broken into 2 pyruvic acid each with 3 carbon atom and produces water + CO2 + energy.
<h3><u>Whereas</u><u>, </u></h3>
<u>Anaerobic </u><u>respiration </u>:- is the process of respiration in which incomplete oxidation of glucose takes place in the absence of oxygen
The end products of glucose in anaerobic respiration is
- <u>In </u><u>human </u><u>muscles</u><u>, </u><u> </u><u>Lactic </u><u>acid </u><u>+</u><u> </u><u>Energy </u>
- <u>In </u><u>yeast</u><u>, </u><u>Ethanol </u><u>+</u><u> </u><u>CO2</u><u> </u><u>+</u><u> </u><u>Energy </u>
<u>Hence</u><u>, </u><u>Option </u><u>D </u><u>is </u><u>the </u><u>correct </u><u>answer</u><u>.</u>
These are the most common symptoms associated with PSTD
Answer:
The lynx's principal food source is the snowshoe hare. These two species' population cycles are intertwined. When hares are abundant, lynx consume almost nothing else and kill two hares every three days. When hares are sparse, lynx eat mice, voles, squirrels, grouse, ptarmigan, and carrion.