Which of the following statements about the cell cycle is correct? MCQ with Answer and Explanation

Explanation:
Mature human RBCs have a lifespan of approximately 120 days, after which they are phagocytosed by macrophages in the spleen, liver, and bone marrow.

Explanation:
Edward Jenner, an English physician, is credited with developing the world's first successful vaccine against smallpox in 1796, using material from cowpox lesions. Alexander Fleming, a Scottish bacteriologist, discovered the first true antibiotic, penicillin, in 1928, from the fungus Penicillium notatum. Louis Pasteur made immense contributions to microbiology and immunology, but the double helix structure of DNA was discovered by James Watson and Francis Crick in 1953. Thus, statements 1 and 2 are correct.

Explanation:
The hypothalamus is the body's thermostat and regulates hunger, thirst, sleep, and emotions. It also controls the pituitary gland.