The organism that is an example of a producer in a pond ecosystem is:
A. Fish
B. Water beetle
C. Frog
D. Algae
Answer: Option D
Solution (By JKSSB Mock Tests)
Algae and aquatic plants are primary producers in pond ecosystems, converting solar energy into biomass through photosynthesis. Fish and frogs are consumers, water beetles are also consumers. Producers form the base of the food web.
Explanation:
Robert Koch identified Bacillus anthracis as the causative agent of anthrax in 1876, establishing Koch's postulates for proving microbial disease causation. Pasteur developed vaccines, Jenner smallpox vaccine, Lister antiseptic surgery.
Explanation:
Scurvy is characterized by bleeding gums, impaired wound healing, and anemia due to defective collagen synthesis from lack of vitamin C (ascorbic acid). Beriberi is B₁ deficiency, pellagra B₃, night blindness vitamin A.
Explanation:
Osmosis is the net diffusion of water through a selectively permeable membrane from a region of low solute (high water potential) to high solute (low water potential).
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