The process by which plants prepare their own food using light energy is known as:
A. Photosynthesis
B. Transpiration
C. Chemosynthesis
D. Respiration
Answer: Option A
Solution (By JKSSB Mock Tests)
Photosynthesis converts CO₂ and H₂O into glucose and oxygen using light energy, catalyzed by chlorophyll in chloroplasts. This process sustains nearly all life, providing food and oxygen. Respiration releases energy from glucose, chemosynthesis uses chemical energy, transpiration is water loss.
Explanation:
The Bohr effect describes how an increase in the partial pressure of CO2 (pCO2) or a decrease in pH (increase in H+ concentration) reduces hemoglobin's affinity for oxygen, shifting the oxygen dissociation curve to the right. This facilitates the unloading of oxygen in metabolically active tissues where CO2 and acid levels are high. The reverse occurs in the lungs, enhancing oxygen loading.
Explanation:
Vaccination introduces antigens (weakened or killed pathogens) to stimulate the body's own immune system to produce antibodies and memory cells without causing disease. This is artificial active immunity. Natural active immunity is acquired by recovering from infection. Artificial passive immunity is direct administration of antibodies (e.g., antiserum). Natural passive immunity is transfer of maternal antibodies to fetus.
Explanation:
Seminal vesicles produce a fructose-rich fluid (energy for sperm), and the prostate gland adds a milky, alkaline fluid to form semen. The testis produces sperm, epididymis stores them, vas deferens transports.
No comments yet. Be the first to start the discussion!