Case study Questions on Class 9 Science Chapter 7 are very important to solve for your exam. Class 9 Science Chapter 7 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 7 Diversity in Living Organisms
In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Diversity in Living Organisms Case Study Questions With answers
Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 7 Diversity in Living Organisms
Case Study/Passage-Based Questions
Question 1:
The first level of classification among plants depends on whether the plant body has well differentiated, distinct parts. The next level of classification is based on whether the differentiated plant body has special tissues for the transport of water and other substances. Further classification looks at the ability to bear seeds and whether the seeds are enclosed within fruits.
THALLOPHYTA
Plants that do not have well-differentiated body designs fall in this group. The plants in this group are commonly called algae. These plants are predominantly aquatic. Examples are Spirogyra, Ulothrix, Cladophora, Ulva, and Chara.
BRYOPHYTA
These are called the amphibians of the plant kingdom. The plant body is commonly differentiated to form stem and leaf-like structures. There is no specialized tissue for the conduction of water and other substances from one part of the plant body to another. Examples are moss (Funaria) and Marchantia.
PTERIDOPHYTA
In this group, the plant body is differentiated into roots, stem, and leaves and has specialized tissue for the conduction of water and other substances from one part of the plant body to another. Some examples are Marsilea and ferns. The reproductive organs of plants in all these three groups are very inconspicuous, and they are therefore called ‘cryptogams’, or ‘those with hidden reproductive organs. On the other hand, plants with well differentiated reproductive parts that ultimately make seeds are called phanerogams. This group is further classified, based on whether the seeds are naked or enclosed in fruits, giving us two groups – gymnosperms and angiosperms.
Gymnosperms are the plants that bear naked seeds and are usually perennial, evergreen and woody. Examples are pines and deodar. Angiosperms are plants whose seeds are enclosed inside an ovary.
(1) Plants that do not have well-differentiated body is known as _________
(a) Bryophytes
(b) Pteridophytes
(c) Thallophytes
(d) Angiosperms
Answer: (c) Thallophytes
(2) The plants which bear naked seeds
(a) Angiosperms
(b) Gymnosperms
(c) Thallophytes
(d) Pteridophytes
Answer: (b) Gymnosperms
(3) Phanerogams are further classified into
(a) Angiosperms
(b) Gymnosperms
(c) Thallophytes
(d) Both a & b
Answer: (d) Both a & b
(4) Which of the following is the distinguishing feature of Bryophytes
(a) Plant body is differentiated to form stem and leaf-like structures
(b) No specialized tissue for the conduction of water and food
(c) Both a & b
(d) None of above
Answer: (b) No specialized tissue for the conduction of water and food
(5) Explain the three important aspects of which classification of Plantae?
Answer: The first level of classification among plants depends on Whether the plant body has well differentiated, distinct parts Whether the differentiated plant body has special tissues for the transport of water The ability to bear seeds and whether the seeds are enclosed within fruits
Question 2:
It is difficult for people speaking or writing in different languages to know when they are talking about the same organism. This problem was resolved by agreeing upon a ‘scientific’ name for organisms in the same manner that chemical symbols and formulae for various substances are used in the world. The scientific name for an organism is thus unique and can be used to identify it anywhere in the world.
The system of scientific naming or nomenclature we use today was introduced by Carolus Linnaeus in the eighteenth century. The scientific name of an organism isthe process of classification which puts it along with the organisms it is most related to. But when we actually name the species, we do not list out the whole hierarchy of groups it belongs to. Instead, we limit ourselves to writing the name of the genus and species of that particular organism. World over, it has been agreed that both these names will be used in Latin forms.
Certain conventions are followed while writing the scientific names:
(1) The name of the genus begins with a capital letter.
(2) The name of the species begins with a small letter.
(3) When printed, the scientific name is given in italics.
(4) When written by hand, the genus name and the species name have to be underlined separately.
(1) The system of scientific naming or nomenclature we use today was introduced by
(a) Carolus Linnaeus
(b) Ernst Haeckel
(c) Robert Whittaker
(d) Carl Woese
Answer: (a) Carolus Linnaeus
(2) When scientific name is printed is given in
(a) Bold
(b) Italics
(c) Italic in lowercase
(d) Bold in uppercase
Answer: (b) Italics
(3) Identify the correct statement
Statement 1 – Name of the genus begins with a capital letter.
Statement 2 – Name of the species begins with a small letter.
Statement 3 –Name of the genus begins with a small letter
Statement 4 –When printed, the scientific name is given in bold
(a) Both 1 & 3
(b) Both 3 & 4
(c) Both 1 & 2
(d) All of the above
Answer: (c) Both 1 & 2
(5) Which rules and conventions need to be followed while writing the scientific names?
Answer: Rules to be followed while writing the scientific name The name of the genus begins with a capital letter. The name of the species begins with a small letter. When printed, the scientific name is given in italics. When written by hand, the genus name and the species name have to be underlined separately.
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