Paper 1
BIOLOGY
(THEORY)
(Botany and Zoology)
(Three hours)
(Candidates are allowed additional 15 •
They must NOT start . ":mutes(or only reading the paper.
writmg dun th· •
AnsWer all questions in Part / and six qu t" . ng is time.)
from each oifthe th esSwn~ m Part II, choosing two questions
. . . ree ectwn A B and c
All working mcludzng rough work sho ld b d' · ·
and ad· · ' u e one on the same sheet as
f}acent to, the rest of the answer . '
t
The intended marks for queS ions or parts of questions are ~iven in brackets [ J.
PART I (20.Marks)
(Answer all questions)
Question 1.
(a) Give a brief answer for each of the following : [ 4]
(i) Why do green plants . start evolving CO 2 instead of 02, at high
temperatures ?**
(ii) Define Apomixis.
(iii) What is a Recon ?**
(iv) Why are the spores of Bacillus thuringiensis used as bioinsecticide ?
(b) Each of the following question(s)/statement(s) has four suggested answers.
Choose the correct option in each case. [4]
(i) Initiation codon of protein synthesis is Eukaryotes is :
(A) GUA (B) GGA
(C) CCA (D) AUG
(ii) Type of interaction where an individual sacrifices its own welfare (life)
for the benefit of another animal of its own species is :
(A) Altruism (B) Scavenging
(C) Protocooperation (D) Commensalism ·
(iii) Wings of insect and birds are examples of:
(A) Analogous (B) Homologous .
(C) Vestigial (D) Atavism
(iv) The pressure ofthe cell contents on the cell wal_l is known as :
u, ll (B) Osmotic pressure
(A) rra pressure
(C) Turgor pressure (D) Diffusion pressure
[4]
(c) Give scientific terms for each of the following : . ·
') . ll fioetus from mother's uterus at the end
(1 An act of expel/mg the Ju term .
'') of gestation.
· · .
through mteguments.
(11 Entry of pollen tube into an ovu1e
. i tbe present syllabus.
•wer is not given due to change n
, 820 I Biology 2017
. .r th si·ngle gene which influences the --:;;:----e
(iii) An alternative form 01 e . · d;rr. ·nd · · "'
;rrerent expressions m i.,1 erent t 1v1duals 0 r
character and produces dl.JJ• 'J
a species.
(iv) The study of human population covering all aspects and parameters.
(d) Expand thefollowing _abbreviations: [4]
(ii) NF
(i) MTP
(iv) DPD**
(iii) HIV
(e) Name the scientists who have contributed to th e following: [4]
(i) Discovered fossil of Cro-Magnon man.
(ii) Classified active and passive absorption of water by roots.
(iii) Reported Haemophilia
(iv) Discovered double fertilization.
Answer 1.
(a) (ii) The term Apomixis has been derived from two Greek word "Apo" meaning
away from and "mixis" which refers to an act of mixing or mingling. It refers to
replacement of the normal sexual reproduction by asexual reproduction, without
fertilization. For example, replacement of the flower by bulbils or replacement of
seed by plantlet are types of apomixis. Offspring produced are genetically
identical to the parent plant. Thus, apomixis is a type of reproduction in which
sexual organs of related structures take part but seeds are formed without union of
gametes. Apomictically derived embryo is derived solely from cells in maternal
ovule tissues.
(iv) Bacillus thuringiensis (Bt) is a soil-dwelling, gram-positive bacteria, used as
a biological pesticide worldwide because of its specific toxicity against target
pests in their larval stage. During sporulation, Bt strains produce crystal proteins
(proteinaceous inclusions), called & endotoxin , which have insecticidal action.
This has led to their use as insecticides, and to genetically modified crops using Bt
genes, such as Bt com.
(b) (i) [DJ AUG (ii) [A] Altruism
(iii) [A] Analogous (iv) [C] Turgor pressure
(c) (i) Parturition (ii) Mesogamy
(iii) Allele
(iv) Demography
(d) (i) Medical terminatio~ of pregnancy (ii) In vitro fertilization
(iii) Human immunodeficiency virus
(e) (i) Louis Lartet
(ii) Mutation theory: Hugo de Vries
(iii) Albucasis
(iv) Sergei Nawaschin in Kiev Russian Ern .
' prre, and Leon Guignard in France.
** Answer is not given due to chan .
ge in the present syllabus.
BIOLOGY
(THEORY)
(Botany and Zoology)
(Three hours)
(Candidates are allowed additional 15 •
They must NOT start . ":mutes(or only reading the paper.
writmg dun th· •
AnsWer all questions in Part / and six qu t" . ng is time.)
from each oifthe th esSwn~ m Part II, choosing two questions
. . . ree ectwn A B and c
All working mcludzng rough work sho ld b d' · ·
and ad· · ' u e one on the same sheet as
f}acent to, the rest of the answer . '
t
The intended marks for queS ions or parts of questions are ~iven in brackets [ J.
PART I (20.Marks)
(Answer all questions)
Question 1.
(a) Give a brief answer for each of the following : [ 4]
(i) Why do green plants . start evolving CO 2 instead of 02, at high
temperatures ?**
(ii) Define Apomixis.
(iii) What is a Recon ?**
(iv) Why are the spores of Bacillus thuringiensis used as bioinsecticide ?
(b) Each of the following question(s)/statement(s) has four suggested answers.
Choose the correct option in each case. [4]
(i) Initiation codon of protein synthesis is Eukaryotes is :
(A) GUA (B) GGA
(C) CCA (D) AUG
(ii) Type of interaction where an individual sacrifices its own welfare (life)
for the benefit of another animal of its own species is :
(A) Altruism (B) Scavenging
(C) Protocooperation (D) Commensalism ·
(iii) Wings of insect and birds are examples of:
(A) Analogous (B) Homologous .
(C) Vestigial (D) Atavism
(iv) The pressure ofthe cell contents on the cell wal_l is known as :
u, ll (B) Osmotic pressure
(A) rra pressure
(C) Turgor pressure (D) Diffusion pressure
[4]
(c) Give scientific terms for each of the following : . ·
') . ll fioetus from mother's uterus at the end
(1 An act of expel/mg the Ju term .
'') of gestation.
· · .
through mteguments.
(11 Entry of pollen tube into an ovu1e
. i tbe present syllabus.
•wer is not given due to change n
, 820 I Biology 2017
. .r th si·ngle gene which influences the --:;;:----e
(iii) An alternative form 01 e . · d;rr. ·nd · · "'
;rrerent expressions m i.,1 erent t 1v1duals 0 r
character and produces dl.JJ• 'J
a species.
(iv) The study of human population covering all aspects and parameters.
(d) Expand thefollowing _abbreviations: [4]
(ii) NF
(i) MTP
(iv) DPD**
(iii) HIV
(e) Name the scientists who have contributed to th e following: [4]
(i) Discovered fossil of Cro-Magnon man.
(ii) Classified active and passive absorption of water by roots.
(iii) Reported Haemophilia
(iv) Discovered double fertilization.
Answer 1.
(a) (ii) The term Apomixis has been derived from two Greek word "Apo" meaning
away from and "mixis" which refers to an act of mixing or mingling. It refers to
replacement of the normal sexual reproduction by asexual reproduction, without
fertilization. For example, replacement of the flower by bulbils or replacement of
seed by plantlet are types of apomixis. Offspring produced are genetically
identical to the parent plant. Thus, apomixis is a type of reproduction in which
sexual organs of related structures take part but seeds are formed without union of
gametes. Apomictically derived embryo is derived solely from cells in maternal
ovule tissues.
(iv) Bacillus thuringiensis (Bt) is a soil-dwelling, gram-positive bacteria, used as
a biological pesticide worldwide because of its specific toxicity against target
pests in their larval stage. During sporulation, Bt strains produce crystal proteins
(proteinaceous inclusions), called & endotoxin , which have insecticidal action.
This has led to their use as insecticides, and to genetically modified crops using Bt
genes, such as Bt com.
(b) (i) [DJ AUG (ii) [A] Altruism
(iii) [A] Analogous (iv) [C] Turgor pressure
(c) (i) Parturition (ii) Mesogamy
(iii) Allele
(iv) Demography
(d) (i) Medical terminatio~ of pregnancy (ii) In vitro fertilization
(iii) Human immunodeficiency virus
(e) (i) Louis Lartet
(ii) Mutation theory: Hugo de Vries
(iii) Albucasis
(iv) Sergei Nawaschin in Kiev Russian Ern .
' prre, and Leon Guignard in France.
** Answer is not given due to chan .
ge in the present syllabus.
