Answer:
Option (3).
Explanation:
The homeostasis of the body is maintained by the feed back loop system. Two main types of the feedback loop system of the body are positive feedback system and negative feedback system.
Positive feedback system may be defined as the feedback in which the final product increases the output of that product. Pepsinogen is an zymogen that helps in the activation of pepsin enzyme. This enzyme helps in the digestion of protein. The digestion of pepsinogen by pepsin result in the more production of pepsin.
Thus, the correct answer is option (3).
Answer:
The cell membrane
Explanation:
This is the phospholipid bilayer that everything that wants to come into the cell has to move throught. It is also selectively permeable.
Streptococcus pyrogenes : Round (or) Ovoid
Paenibaccilus polymyxa:
Aquaspirillum bengal: Helical
Explanation:
- Streptococcus pyogenes are gram positive, Round shaped, Anaerobic growth bacteria, Non-motile bacteria.
- Aquaspirillum bengal is helical in shape with its composition of deoxyribonucleic acid and cytosine. It is Gram negative and chemo-organotrophic. It is also motile with the help of flagella.
- Paenibacillus polymyxa is also known as Bacillus polymyxa which is capable of fixing nitrogen. It is found in soil, plant tissues and marine sediments. It has a major role in forest ecosystems and potential future applications as a biofertilizer and biocontrol agent in agriculture.
It is actually a fruiting-body.
