Revision Notes for Class 11 Biology The Living World
Class 11 Biology students should refer to the following concepts and notes for The Living World in standard 11. These exam notes for Grade 11 Biology will be very useful for upcoming class tests and examinations and help you to score good marks
The Living World Notes Class 11 Biology
The Living World MCQ Questions with Answers Class 11 Biology
Question- The simplest amino acid is:
a. Aspartic acid
b. Tyrosine
c. Lysine
d. Glycine
Answer-d
Question-The word systematics is derived from
a. Greek word systema
b. Italic word systema
c. Latin word systema
d. English word systema
Answer-c
Question-Which of the following taxonomic categories contains organisms least similar to one another?
a Genera
b. Family
c. Class
d. Species
Answer-c
Question-Improvement of human race through improvement of human environment is:
a. Anthropology
b. Euthenics
c. Euphenics
d. Eugenics
Answer-b
Question- Taxon represents:
a. Rank in classification
b. Basic unit of classification
c. Both of these
d. None of these
Answer-a
Question- As we go lower from kingdom to species the number of common characteristics goes on
a. Increasing
b. Remain unchanged
c. Decreasing
d. Sometimes decreasing
Answer-a
Question-Thesuffix – inae signifies the rank:
a. Tribe
b. Subtribe
c. Suborder
d. Family
Answer-b
Question-A prediction made by a scientist based on his observation is known as:
a. Law
b. Principle
c. Theory
d. Hypothesis
Answer-d
Question- Glucose in taken in test tube and acted upon by hexokinase enzyme. Resulting substrate is glucose - 6 - phosphate. This isolated metabolic reaction is:
a. Occurring in test tube which can be considered as living
b. Considered to be in vivo
c. Considered to be in vitro and living reaction.
d. Considered as non-living reaction
Answer-c
Question-Species living in different geographical areas are called:
a. Allochronic
b. Allopatric
c. Sympatric
d. Siblings
Answer-b
Question-In Mangifera indica Linn. indica refers to
a. Genus
b. Author
c. Family
d. Species
Answer-d
Question- Basis of Taxonomy are:
a. Identification - Characterization - Classification -Nomenclature
b. Characterization - Identification - Classification -Nomenclature
c. Classification - Characterization - Identification -Nomenclature
d. Nomenclature - Classification - Identification -characterization
Answer-a
Question-Edaphology is:
a. Study of soils
b. Study of amphibians
c. Study of snakes
d. Study of elephants
Answer-a
Question-The scientific name of banyan is written as Ficus bengalensis L. which of the following is a correct statement regarding this?
a. Letter L signifies Latin language.
b. The name should be reverse with bengalensis preceding Ficus
c. Letter L signifies taxonomist Linnaeus
d. Bengalensis is generic name
Answer-c
Question-Systematics takes accounts:
a. Evolutionary relationship between organisms.
b. Breeding relationship between organisms.
c. Economic relationship between organisms.
d. None of these
Answer-a
Question-Term biology was introduced by:
a. Aristotle
b. Darwin
c. John Ray
d. Lamarck and Treviranus
Answer-d
Question- Term classification was given by:
a. A.P de Condolle
b. Norman E. Borloug
c. Tansley
d. None of these
Answer-a
Question- Which of the following combinations is correct for wheat ?
a. Genus : Triticum, Family : Anacardiaceae, Order : Poales, Class : Monocotyledonae
b. Genus : Triticum, Family : Poaceae, Order : Poales,Class : Dicotyledonae
c. Genus : Triticum, Family : Poaceae, Order : Sapindales, Class : Monocotyledonae
d. Genus : Triticum, Family : Poaceae, Order : Poales, Class : Monocotyledonae
Answer-d
Question-Determination of age by counting growth rings falls under:
a. Chorology
b. Chronology
c. Dendrology
d. Dendrochronology
Answer-d
Question-In taxonomy the first step is:
a. Identification
b. Nomenclature
c. Classification
d. Affinities
Answer-a
1. The Living World
POINTS TO REMEMBER:
Characteristics of Living Organisms : Growth, reproduction, metabolism, cellular organization, consciousness (ability to sense environment), self-replicating and self regulation.
• Reproduction and growth are NOT defining properties.
• Metabolism, cellular organization and consciousness are defining properties.
Biodiversity : Term used to refer to the number of varieties of plant and animals on earth.
Nomenclature: standardize the naming of living organism such that a particular organism is known by the name all over the world.
Identification: nomenclature or naming is only possible when the organism is described correctly and we known to what organism the name is attached to.
Need for classification: To organize the vast number of plants and animals into categories that could be named, remembered, studied and understood.
Rules for Nomenclature:
• Latinized names are used, written in italics
• First word represents the genus, second word is species name.
• Printed in italics; if handwritten then underline separately.
• First word starts with capital letter while species name written in small letter.
ICBN: International Code of Botanical Nomenclature (for giving scientific name to plants.)
ICZN: International Code of Zoological Nomenclature (for giving scientific name to animals.)
Taxonomy: Study of principles and procedures of classification.
Binomial Nomenclature: Given by Carolus Linnaeus. Each scientific name has two components - Generic name + Specific epithet.
Systematics: It deals with classification of organisms based on their diversities and relationships among them. Term was proposed by Carolus Linnaeus who wrote ‘Systema Naturae’.
Taxonomic Hierarchy: Arrangement of various steps (categories or taxa Species → Genus → Family → Order → Class → Phylum (for animals) /Division (for plants) Kingdom→
Species: All the members that can interbreed among themselves and can produce fertile offsprings are the members of same species. This is the bio-logical concept of species proposed by Mayer.
Three Domains of Life: Proposed by Carl Woese in 1990 who also proposed the six kingdom classification for living organisms. The three Do-mains are Archaea, Eubacteria and Eukarya.
Herbarium: Storehouse of dried, pressed and preserved plant specimen on sheets.
Botanical Garden: Collection of living plants for reference.
Taxonomical aids: Zoological Park (Places where wild animals are kept in protected environment.)
• Keys (Used for identification of plant and animals on the basis of similarities and dissimilarities.)
• Fauna: (Index to animal species found in a particular area)
• Flora (Index to plant species found in a particular area.)
• Manuals (Provide information for identification of name of species in an area.)
• Monograph (Contain information on one taxon.)
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