The process by which plants produce offspring from vegetative parts is:
A. Sexual reproduction
B. Vegetative propagation
C. Pollination
D. Fertilization
Answer: Option B
Solution (By JKSSB Mock Tests)
Vegetative propagation is asexual reproduction using stems (runners, tubers), roots, or leaves, producing clones. Examples: potato (tuber), strawberry (runner). Sexual reproduction involves seeds from pollination/fertilization.
Explanation:
Louis Pasteur developed the first rabies vaccine in 1885, using dried spinal cords from infected rabbits. Jenner developed smallpox vaccine, Koch identified tuberculosis bacterium, Salk developed inactivated polio vaccine.
Explanation:
Energy pyramids are always upright because energy decreases at higher trophic levels. Pyramids of numbers and biomass can be inverted (e.g., tree ecosystem, aquatic).
Explanation:
Creutzfeldt-Jakob disease (CJD) is a rare, fatal brain disorder caused by misfolded prion proteins (PrP^Sc), which are infectious protein particles lacking nucleic acid. Rabies, polio, and influenza are caused by viruses. Prions cause spongiform encephalopathies like mad cow disease (BSE).
No comments yet. Be the first to start the discussion!