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

The 'Red Data Book' is a document maintained by the IUCN that provides information about:
A. The blood groups of different animal species
B. The most common and abundant species in the world
C. The chemical composition of various red pigments in nature
D. Threatened and endangered species of plants and animals
Answer: Option D
Solution (By JKSSB Mock Tests)
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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Practice More Biology Questions

Question #1
The technique of creating a gene library by inserting DNA fragments into plasmid vectors and introducing into bacteria is:
A. Cloning
B. PCR
C. Microarray
D. DNA sequencing

Correct Answer: Option A


Explanation:
Molecular cloning involves inserting a DNA fragment into a vector (e.g., plasmid), which is then taken up by host cells (e.g., E. coli). As the bacteria replicate, they produce many copies of the inserted DNA, creating a gene library. PCR amplifies without vectors, sequencing reads bases, microarrays analyze expression.

This question belongs to: Science Biology
Question #2
The 'Bottleneck effect' in population genetics refers to:
A. The movement of individuals into a new population, introducing new alleles
B. A sharp reduction in the size of a population due to environmental events, leading to a loss of genetic variation
C. The non-random mating of individuals based on specific traits
D. The gradual accumulation of beneficial mutations in a population

Correct Answer: Option B


Explanation:
The bottleneck effect is a form of genetic drift that occurs when a population's size is drastically reduced for at least one generation due to a severe environmental event (like a natural disaster, disease, or overhunting). The surviving population is a random, small sample of the original, and its gene pool may not represent the original population's genetic diversity. This leads to a significant loss of genetic variation, making the population more vulnerable to future changes.

This question belongs to: Science Biology
Question #3
The process of sperm fusing with an egg to form a zygote is:
A. Pollination
B. Implantation
C. Cleavage
D. Fertilization

Correct Answer: Option D


Explanation:
Fertilization is the union of a haploid sperm and a haploid ovum to form a diploid zygote. Pollination is pollen transfer in plants, implantation is embryo embedding in uterine wall, cleavage early mitotic divisions.

This question belongs to: Science Biology