CBSE Questions for Class 11 Medical Biology The Living World Quiz 1 - MCQExams.com

A. Correct option: B 
B. Explanation for correct option:

• The Western Ghats is one of the hottest biodiversity spots.
• It occurs along the western coast of India in Maharashtra, Karnataka, Tamil Nadu and Kerala.
• There is a high degree of species richness and endemism of flowering, non-flowering plants, reptiles, amphibians, insects, birds, fishes species.
• Many of the species are undiscovered and many of them threaten species that occur in the Western Ghats.
  
  

C. Explanation for incorrect option:

Option A: The large-scale planting of Bt cotton can influence the natural crop. It can also increase the risk of new insect varieties.
Option C: Developing countries are also involved in  biodiversity conservation e.g. India
Option D: Different animals are found in these desert areas but very few of them are rare animals.

Correct answer: B
Explanation:

• The Herbarium is a collection of preserved plants that are stored, catalogued, and arranged systematically for study.
• When specimens are collected in the field, the Herbarium and associated information in the library are used to identify these specimens, to determine how one species differs from another, or whether a specimen represents a species new to science. 
• Thus, helping in the understanding of plant diversity, conservation, and sustainable use.  
• The Herbarium is a collection of preserved plants that are stored, catalogued, and arranged systematically for study. It does not carry information on plant height.

• The term beta diversity was introduced by R.H. Whittaker in 1960. He defined it as “the extent of change in community composition or difference in species composition in different sites either local or entire landscape". 
• Therefore, beta diversity is the diversity operating between communities. Beta diversity is the connecting link between regional and local diversity. It shows the difference in species among the sites.

• The portion of the universe where all life is found is called the biosphere.
  
• Bio-conservation is the conservation of living all the living species. 
• Bio-community is the area and community formed by all the living organisms.
• Biodiversity is the variety of living organisms, plants and animals, i.e. flora and fauna in a region.

• Life began on earth some 3.8 million years ago and was initially occupied by the single-celled prokaryotic cells, such as bacteria. Multicellular organisms evolved over a billion years later.
•  However, studies conducted on the genetic material suggest that single-celled living organisms that used carbon dioxide as a source of carbon and oxidized inorganic materials to extract energy were the first forms of life on earth. 
• These organisms are called chemoautotrophs.

• Biodiversity means the diversity of living forms. Different life forms have a different physical appearance. 
• Some are tall, some are short and their mode of life is also different. For example, some are autotrophs some are heterotrophs, some organisms live in water or land or both.

• A family is a group of the related genus in between Order and Genus.
• They have still less number of similarities as compared to genus and species.
  
• Families are characterized on the basis of both vegetative and reproductive features of plant species. Example: Three different genera; Solanum, petunia and the Torah is placed in the family Solanaceae.
  

Correct option: D

Explanation:

• Classification is the grouping or categorizing of organisms based on their similarities.
• Classification is the study of organisms it makes it easy, and we understand the inter-relationships among different organisms.
• One can compare and study the concept of the evolution of organisms.

Hence, ‘all of the above’ is the correct answer.