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Important Questions (1 mark): Diversity in Living Organisms


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25 Questions MCQ Test Science Class 9 | Important Questions (1 mark): Diversity in Living Organisms

Important Questions (1 mark): Diversity in Living Organisms for Class 9 2022 is part of Science Class 9 preparation. The Important Questions (1 mark): Diversity in Living Organisms questions and answers have been prepared according to the Class 9 exam syllabus.The Important Questions (1 mark): Diversity in Living Organisms MCQs are made for Class 9 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions (1 mark): Diversity in Living Organisms below.
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Important Questions (1 mark): Diversity in Living Organisms - Question 1

The smallest taxon is :-

Important Questions (1 mark): Diversity in Living Organisms - Question 2

An organism that can live and grow in presence of oxygen is called :-

Important Questions (1 mark): Diversity in Living Organisms - Question 3

Which of the following is unicellular green alga ?

Important Questions (1 mark): Diversity in Living Organisms - Question 4

Which one of the following represents the non-flowering seeded plants ?

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 4

There are two main groups of non-flowering plants. Plants that use spores to reproduce and plants that use seeds to reproduce. The non-flowering plants that use seeds are called gymnosperms. Gymnosperm means "naked seeds". They are called this because their seeds are open to the air with no covering such as the seeds of flowering plants. One of the major groups of gymnosperm plants is the conifer. Fern is a spore producing plant. Ferns produce spore casings on the underside of their leaves. These look like brown spots. At some point the casings dry out and the spores are released into the air. 

Important Questions (1 mark): Diversity in Living Organisms - Question 5

Non-Chlorophyllous heterotrophic plants are :-

Important Questions (1 mark): Diversity in Living Organisms - Question 6

Which one of the following is pteridophyte ?

Important Questions (1 mark): Diversity in Living Organisms - Question 7

Xylem lacks vessels and phloem lacks companion cells in :-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 7

Companion cells are specialised parenchyma cells which are present adjacent to a sieve tube in the phloem of flowering plants. These cells are present in the angiosperms. These cells are absent in the pteridophytes and gymnosperms. Pinus is a gymnosperm and is devoid of the companion cell. The xylem of gymnosperms consists of tracheids for conducting sap as vessels are absent.

Important Questions (1 mark): Diversity in Living Organisms - Question 8

Which type of food is stored in Fungi ?

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 8
Glycogen, also known as "animal starch", is the chief polysaccharide store of animal cells and most of the fungi (though food is also stored as oil globules in some fungi).
Starch is a complex water insoluble polysaccharide carbohydrate chiefly found in green plants as their principal energy (food) source.
Glucose is the most widely distributed hexose sugar. It is an aldohexose reducing sugar. It is found in blood muscles and brain and works as energy fuel.
Sucrose is a non-reducing disaccharide consists of one glucose and one fructose molecules. It is one of the abundant transport sugar in plants. 
Important Questions (1 mark): Diversity in Living Organisms - Question 9

Gymnosperms and angiosperms are included in :-

Important Questions (1 mark): Diversity in Living Organisms - Question 10

Maize is a :-

Important Questions (1 mark): Diversity in Living Organisms - Question 11

A branch of biology which deals with the identification, nomenclature and classification of organisms is called :-

Important Questions (1 mark): Diversity in Living Organisms - Question 12

Who is known as father of taxonomy ?

Important Questions (1 mark): Diversity in Living Organisms - Question 13

Binomial nomenclature was introduced by :

Important Questions (1 mark): Diversity in Living Organisms - Question 14

Association between Algae and fungi is known as :-

Important Questions (1 mark): Diversity in Living Organisms - Question 15

A group of freely interbreeding organism constitutes a :-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 15
→Those organism which freely interbreed are known as Species. 

→And group of Species or the freely interbreeding organism consititue Genus.

→In the hairarchy the top rank or taxon is Kingdom : A Group of phyllum.

→Then comes phyllum : A Group of class.

→Then comes Class which is a Group of Order.

→Then comes order which is a Group of Genus.

→And finally Genus which is a group of Species.
Important Questions (1 mark): Diversity in Living Organisms - Question 16

According to binomial nomenclature, the scientific name of an organism must consists of two words. These
are:-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 16

Each scientific name in binomial nomenclature consists of two names, also called descriptors or epithets. The first word is the generic epithet and describes the genus that an animal belongs to. The second word is the specific epithet and refers to the species of the organism. Typically, the words have a Latin base and describe the genus or species with references to traits that are specific to the group. When written, the text of a scientific name is usually italicized or underlined, to clarify that it is a scientific name written in binomial nomenclature. The generic epithet is always capitalized, while the specific epithet is written in lower-case. In some older documents, both may be capitalized. Typically, the full name should be written out. However, when discussing many species of the same genus, the generic name is sometimes abbreviated to the first letter, still capitalized.

Important Questions (1 mark): Diversity in Living Organisms - Question 17

Which taxonomic term may be substituted for any rank in the classification ?

Important Questions (1 mark): Diversity in Living Organisms - Question 18

Algae belong to :-

Important Questions (1 mark): Diversity in Living Organisms - Question 19

Algae are characterized by :-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 19

Algae are eukaryotic organisms that have no roots, stems, or leaves but do have chlorophyll and other pigments for carrying out photosynthesis. Algae can be multicellular or unicellular and are characterized by the green colour slippery appearance and spread during rainy seasons.

Important Questions (1 mark): Diversity in Living Organisms - Question 20

In Whittaker's classification, unicellular organisms are grouped under :-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 20

The correct option is A.
In Whittaker's five kingdom classification, The kingdoms Monera and Protista include unicellular organisms. Kingdom Monera includes all prokaryotic unicellular organism like Bacteria and Archaebacteria, while kingdom Protista includes all eukaryotic unicellular organisms like Amoeba, Euglena, Paramoecium etc

Important Questions (1 mark): Diversity in Living Organisms - Question 21

Ribosomes contain large quantities of :-

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 21

The correct answer is C as Ribosomes contain large quantities of ribonucleic acid.

Important Questions (1 mark): Diversity in Living Organisms - Question 22

Glycocalyx is :-

Important Questions (1 mark): Diversity in Living Organisms - Question 23

Which of the following organelles lack membranes ?

Detailed Solution for Important Questions (1 mark): Diversity in Living Organisms - Question 23

Ribosome exist as free structures that float throughout the cytoplasm of the cell. they do not have membranes, which allows them to pick up translational RNA released from the nucleus and grab onto free amino acids in order to produce protein chains.

Important Questions (1 mark): Diversity in Living Organisms - Question 24

Protein synthesis occurs on :-

Important Questions (1 mark): Diversity in Living Organisms - Question 25

The term protoplasm was coined by :-

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