Every chromosome is made up of coils of DNA.
-TheOneandOnly003
Answer:
The correct answer is option - d. Production of primary spermatocytes.
Explanation:
The accessory cells or supporting cells present within the seminiferous tubules of reproductive system termed as the Sertoli cells. They play various roles in the body and reproductive system.
Sertoli cells make blood-testis barrier in adjacent Sertoli cells in the seminiferous tubules. These cells secrete different types of enzymes and hormones such as inhibin which are also secreted by ovary and placenta in females. Sertoli cells produce seminiferous tubular fluid to provide nutrition to the sperm. Apoptotic germ cells are timely eliminated by these cells.
Thus, the correct answer is option D. Production of primary spermatocytes.
Answer:
The correct answer is "Charles Lyell".
Explanation:
Charles Lyell was a notorious Scottish geologist that associated events of Earth's history with natural events taking place at the same time. In 1830, Charles Lyell published the book "Principles of Geology", associating the formation of the Earth's crust with different small and vast natural events. Charles Darwin's was largely influenced by Lyell's ideas and he took his book during the famous travel trough the Galapagos islands.
Answer:
Carbon binds to oxygen, hydrogen, and nitrogen covalently to form the many molecules important for cellular function. Carbon has four electrons in its outermost shell and can form four bonds. Carbon and hydrogen can form hydrocarbon chains or rings
