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.
Answer:
B
Explanation:
When deforestation takes place, it heats up the atmosphere causing more global warming.
Elements pass from one organism to another and among parts of the biosphere through closed loops called biogeochemical cycles, which are powered by the flow of energy.
Answer:
Manuel Roxas, (born Jan. 1, 1892, Capiz, Phil.—died April 15, 1948, Clark Field, Pampanga), political leader and first president (1946–48) of the independent Republic of the Philippines.
After studying law at the University of the Philippines, near Manila, Roxas began his political career in 1917 as a member of the municipal council of Capiz (renamed Roxas in 1949). He was governor of the province of Capiz in 1919–21 and was then elected to the Philippine House of Representatives, subsequently serving as Speaker of the House and a member of the Council of State. In 1923 he and Manuel Quezon, the president of the Senate, resigned in protest from the Council of State when the U.S. governor-general (Leonard Wood) began vetoing bills passed by the Philippine legislature. In 1932 Roxas and Sergio Osmeña, the Nacionalista Party leader, led the Philippine Independence Mission to Washington, D.C., where they influenced the passage of the Hare-Hawes-Cutting Act. Roxas was later opposed by Quezon, who held that the act compromised future Philippine independence; the Nacionalista Party was split between them on this issue.
Explanation:
Explanation:
You have 20% of adenine. If you have 20% of adenine than you have 20% of thymine, because the amount of adenine and thymine is equal. 20% plus 20% is 40% of adennine and thymine. From 100% DNA bases subtract 40% and you will get 60%. Then divide this by 2 and you will get 30%. 30% of guanine and 30% of cytosine, because their amounts are equal in the DNA stand.
