PMS PAST PAPER HELD ON 04.04.2022Which form of nitrogen is taken by producers of the ecosystem?
A) CO₂
B) N₂
C) NH₃
D) NH₄NO₃
Producers such as green plants absorb usable nitrogen compounds from the soil, including ammonia (NH₃) and nitrates. Nitrogen is essential for making proteins, chlorophyll, and nucleic acids necessary for plant growth and ecosystem balance.
PMS PAST PAPER HELD ON 04.04.2022
A)
300 m/s
B)
600 m/s
C)
1200 m/s
D)
2400 m/s
The speed of sound in dry air at room temperature is approximately 300–343 meters per second. The exact speed varies depending on factors such as temperature, humidity, and air pressure.
PMS PAST PAPER HELD ON 04.04.2022
A)
May 1991
B)
June 1992
C)
May 1992
D)
April 1995
The Rio Earth Summit, officially called the United Nations Conference on Environment and Development (UNCED), was held in June 1992 in Rio de Janeiro, Brazil. It focused on sustainable development, environmental protection, and climate-related policies.
PMS PAST PAPER HELD ON 04.04.2022
A)
Stigma
B)
Anthers
C)
Ovary
D)
Petals
After fertilization, the ovary of a flower develops into a fruit while the ovules become seeds. The fruit protects the seeds and often helps in their dispersal through animals, wind, or water.
PMS PAST PAPER HELD ON 04.04.2022
A)
Quantum theory
B)
Gravitational theory
C)
Theory of relativity
D)
Quality theory
Max Planck introduced quantum theory in 1900 while studying blackbody radiation. His work revolutionized modern physics by showing that energy is emitted in discrete packets called quanta, laying the foundation for quantum mechanics.
PMS PAST PAPER HELD ON 04.04.2022
A)
Vitamins
B)
Carbohydrates
C)
Minerals
D)
Proteins
Most enzymes are proteins that act as biological catalysts in living organisms. They speed up chemical reactions necessary for digestion, metabolism, respiration, and many other cellular activities without being consumed themselves.
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