Biology Today — May 2017

1. A system of classifying living and extinct organisms in the
   historical order in which they have evolved from common
   ancestors, according to their characters, is called
   (a) cladistics
   (b) classical taxonomy
   (c) phenetics
   (d) numerical taxonomy.


2. Identify the organisms having following features.
   (i) They are unicellular, usually marine and
   photosynthetic.
   (ii) Cells are usually covered by cellulosic plates called theca.
   (iii) A toxin produced by them causes paralytic shell fish
   poisoning in humans.
   (iv) Some of them cause red tides and some show
   bioluminescence.
   (a) Chrysophytes (b) Dinoflagellates
   (c) Slime moulds (d) Euglenoids


3. The book Historia Naturalis was written by
   (a) Linnaeus (b) John Ray
   (c) Pliny the Elder (d) Theophrastus.


4. Consider the following statements and select the correct
   option stating which ones are true (T) and which ones are
   false (F) regarding binomial nomenclature.
   (i) The specific epithet can be single or compound and
   begins with a small letter.
   (ii) The name of the author is written in Greek script.
   (iii) The names of families and sub-families should be
   based on name of genus.
   (i) (ii) (iii)
   (a) T F F
   (b) T T T
   (c) F F T
   (d) T F T

Total Marks : 160 Duration : 40 Min.

T

his specially designed column enables students to self analyse their

extent of understanding of specified chapters. Give yourself four

marks for correct answer and deduct one mark for wrong answer.

Self check table given at the end will help you to check your

readiness.

Class XI

5. Study the given table and identify A, B and C.

Feature Bacteria Cyanobacteria

(i) Cell wall 1-2 layered A

(ii) Flagella Present B

(iii) Carbohydrate

reserve food

C Cyanophycean

starch

A B C

(a) 2-layered Present Glycogen

(b) 3-layered Absent Starch

(c) 4-layered Absent Glycogen

(d) 1-2 layered Present Starch

6. Select the correct option to fill up the blanks in the following
   statements.
   (i) _ has all information about a particular taxon.
   (ii) A handy book that contains instructions for the
   collection, identification and occurrence of species in
   an area is called ___.
   (iii) __ contains a list of characters and their alternates
   to identify various taxa.
   (i) (ii) (iii)
   (a) Catalogue monograph Manual
   (b) Monograph manual Key
   (c) Key catalogue Manual
   (d) Monograph manual Catalogue


7. Genus, Family and Class of housefly respectively are
   (a) Domestica, Diptera, Insecta
   (b) Musca, Insecta, Arthropoda
   (c) Domestica, Musca, Insecta
   (d) Musca, Muscidae, Insecta.

•    The Living World

•    Biological Classification

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