The 'Red Data Book' is a document maintained by the IUCN that provides information about: MCQ with Answer and Explanation

Question
The 'Red Data Book' is a document maintained by the IUCN that provides information about:
A. Threatened and endangered species of plants and animals
B. The most common and abundant species in the world
C. The chemical composition of various red pigments in nature
D. The blood groups of different animal species
Answer: Option A
Solution (By JKExamLibrary)
The Red Data Book (or Red List) is a comprehensive document maintained by the International Union for Conservation of Nature (IUCN). It records the global conservation status of plant and animal species. It categorizes species based on their risk of extinction, using categories like Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, and Least Concern. It serves as a critical tool for identifying species that require urgent conservation efforts.
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Question #1
Assertion (A): Humans are ureotelic.
Reason (R): The liver converts ammonia to urea, which is excreted in urine.
A. A false, R true.
B. A true, R false.
C. Both A and R are true, and R is the correct explanation.
D. Both A and R are true, but R is not the correct explanation.
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Correct Answer: Option C

Explanation:
Ammonia, toxic, is converted to less toxic urea in the liver via the urea cycle, then excreted by kidneys. Thus, humans excrete urea (ureotelic). R explains A.
This question belongs to: Science Biology
Question #2
The scientist who isolated the first antibiotic, penicillin, from Penicillium notatum was:
A. Howard Florey
B. Alexander Fleming
C. Selman Waksman
D. Ernst Chain
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Correct Answer: Option B

Explanation:
Alexander Fleming discovered penicillin in 1928. Florey and Chain later purified it and demonstrated its therapeutic potential. Waksman discovered streptomycin. The discovery of penicillin revolutionized medicine.
This question belongs to: Science Biology
Question #3
Consider statements about ecology: 1. A food chain shows the flow of energy. 2. A food web shows interconnected food chains. 3. Decomposers are the primary producers. Which are correct?
A. 2 and 3 only
B. 1 and 2 only
C. 1 and 3 only
D. 1, 2 and 3
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Correct Answer: Option B

Explanation:
A food chain is a linear sequence showing the transfer of energy and matter from one organism to another through consumption. A food web is a complex, interconnected network of multiple food chains, representing the realistic feeding relationships in an ecosystem. Decomposers (bacteria and fungi) are saprotrophs that break down dead organic matter; primary producers are autotrophs (plants, algae) that synthesize their own food. Thus, statements 1 and 2 are correct.
This question belongs to: Science Biology
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