NEET Zoology - MCQ Practice Questions

A 26-year-old male presents with complaints of erectile dysfunction and reduced sperm count. Testosterone level is 2.5 ng/mL (normal: 3-10 ng/mL). What could be the underlying cause?

During oogenesis, at which stage does the first meiotic division complete?

A 35-year-old woman with three previous cesarean deliveries presents with vaginal bleeding at 32 weeks. What is the most likely diagnosis?

A couple has been trying to conceive for 2 years without success. The male partner has normal semen parameters, but the female partner has elevated FSH levels. What does this indicate?

A 27-year-old nulliparous woman with endometriosis and infertility is considering assisted reproductive technology. Which ART technique would be most beneficial for her?

A man with cystic fibrosis presents with infertility. Which finding is characteristic in his semen analysis?

A couple with unexplained infertility (normal semen analysis, ovulation confirmed, patent tubes) is offered IVF. What is the rationale for this recommendation?

The Gause's law of competitive exclusion states that:

The phenomenon where a species' role varies in different environmental contexts is called:

The phenomenon of biomagnification poses serious health risks because:

Climate change in India is predicted to most severely impact which agricultural region?

The concept of 'tragedy of the commons' in environmental management refers to:

Which regulatory mechanism would most effectively reduce plastic pollution in Indian coastal ecosystems?

In a pyramid of numbers, why would an inverted pyramid occur in certain ecosystems?

Which of the following statements about ecological pyramids is correct?

Which of the following would be the most effective long-term solution for controlling invasive species in Indian wetlands?

In the context of India's National Action Plan on Climate Change, which sector is projected to face the most severe water stress by 2050?

In a stable tropical forest ecosystem with high biodiversity, which Shannon diversity index range would be most appropriate?

Which mechanism explains the coexistence of multiple predator species in the Indian savanna without competitive exclusion?

In a predator-prey relationship within Indian grasslands, population cycles demonstrate Lotka-Volterra equations. If prey population peaks, the predator population would peak approximately: