CBSE Questions for Class 11 Medical Biology The Living World Quiz 2 - MCQExams.com

• The family comprises several genera ( plural of genus ) with less number of similarities compared to genus or species.
  
• Order and class are further higher taxonomic categories with even fewer characteristics in common.

• An arboretum is a botanical garden with trees. 
• Commonly a modern arboretum is a botanical garden containing living collections of woody plants and is intended for scientific study.
• So, the correct answer is 'Botanical garden with trees'

• Common characters increase as we are move from lower taxonomic rank to the higher one. Each higher rank contains several lower ranks taxa.
• Species is a lower rank than kingdom and genus.
• The order is a lower rank than class.

• Systematics is the science of identifying, naming and classifying the organisms on the basis of the evolutionary relationship.
  
• Anatomy is the science of the internal structure of organisms and morphology is the external appearance of an organism. 
  
• Taxonomy deals only with identifying and naming of the organism.
  

$$\textbf{Correct option:}$$ (C)

$$\textbf{Explanation for correct option:}$$

$$\bullet$$ The accelerated rates of species extinction which the world is facing are mainly due to human activities.

$$\bullet$$ There are four major causes of loss of biodiversity ("The Evil Quartet)":

i) Habitat loss and fragmentation

ii) Over exploitation of natural resources 

iii) Alien species invasions

iv) Co- extinctions

$$\bullet$$ Zoological parks are the means of ex situ conservation of biodiversity in which animals are taken out from their natural habitat and placed in special setting where they are protected and given proper care.

$$\bullet$$ Hence, the correct option is (C)

• Biodiversity refers to the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level.
• It deals with biological and geographical units such as genes, chromosomes, species, families and biogeographic religions
• It is an additional sum of genetic, taxonomic and ecosystem diversity.
• Biodiversity is a measure of species richness i.e  The number of groups of genetically or functionally related individuals.
• Hence Biodiversity is a measure of the number of resources shared by the human population is a wrong statement.
• So, the correct answer is 'Option C'.

Correct option: B
Explanation:

• ICBN stands for - International Code of Botanical Nomenclature. 
  
• It is the set of rules and recommendations for naming plants, fungi, and algae as the ICBN applies not only to plants, as they are now defined, but also to other organisms traditionally studied by botanists.
  

Correct option: D
Explanation:

• New systematics coined by Sir Julian Huxley in 1940 takes into consideration plant identification and grouping collected through multiple branches of science.
• He also invented the term cline in 1938 to refer to species, whose members fall into a series of sub-species with continuous change in characters over a geographical area.
  
• Thus, the correct answer is option D. 

• Medicinal plants also called medicinal herbs, have been discovered and used in traditional medicine practices since prehistoric times. Plants synthesize hundreds of chemical compounds for functions including defense against insects, fungi, diseases etc,
• Garden of medicinal plants is located in West Bengal of India. It is located in Malda of West Bengal. We can come across with a large variety of species of plants which are medicinally used from our Ancient history.
  
• West Bengal is very popular for its many varieties of plant cultivations and many species of herbs and there is one of the world's natural wonders Sundarbans, which is a natural habitat of many plant and animal species.
• So the correct option is West Bengal.

$$\textbf{Correct Option D}$$

$$\textbf{Solution}$$

$$\bullet$$ Biosystematics refers to the study of various diversity of life forms that existed in the past as well as in the present and to find a connection between them across time.

1. Kingdom: The topmost taxonomic category. Example: All animals are included in Kingdom Animalia. The unit in classification that denotes the grouping of organisms based on features which are observable is known as a taxon.
   
2. Phylum: It is a term used for animals while its synonym division is used for plants. It is a collection of similar classes. Phylum Chordata of animals has class Mammalia along with birds, reptiles, and amphibians.
   
3. Class: One or more than one order makes a class. Class Mammalia includes all mammals which are bats, rodents, kangaroos, whales, great apes, and man.
   
4. Order: One or more than one similar families constitute an order. 
   
5. Family: It is defined as a collection of similar genera. It can be separated from genera by reproductive and vegetative features. For example, cats and leopard are included in the same family.
   
6. Genus: It is defined as a group of similar species.
   
7. Species: Group of a population which is similar in form, shape and reproductive features so that fertile sibling can be produced.