Answer:
High-frequency sound wave's energy (vibration) is capable of shaking apart bacterial cells like an opera singer shattering wine glasses.
Explanation:
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Titanium is a strong, light metal. It is as strong as steel and twice as strong as aluminum but 45% lighter than steel and highly resistant to corrosion. It is used in making alloys and is mostly added to steel because it increases the strength and resistance to corrosion of steel.
Titanium - steel alloys are particularly useful in spacecraft and aircraft applications which account for about 65% of all Titanium sold. These alloys find a host of other applications such as in manufacture of jewelry, bicycles, golf clubs, various sports equipment and also in the medical field as artificial hips, knees and specialized dental implants.
<span>Activation energy refers to the amount of energy required by certain chemicals for them to have a reaction.
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Answer:
The correct answer will be option-B.
Explanation:
Sertoli cells are the large somatic cells present in the testis which helps in the formation of spermatozoa. The Sertoli cells create a suitable environment for the production and maturation of the sperms as they produce certain molecules which nourishes the sperms.
The Sertoli cells act as a barrier between the testis and blood and secrete enzymes like inhibin. They eliminate the apoptotic germ cells and also produce seminiferous fluid to nourish the sperm. They do not play any role in primary spermatocytes.
Thus, Option-B is the correct answer.
