Which of the following is the most important cause
of animals and plants being driven to extinction ?
(1) Over - exploitation
(2) Alien species invasion
(3) Habitat loss and fragmentation
(4) Co-extinctions

Which of the following is a characteristic feature of
cropland ecosystem ?
(1) Absence of soil organisms
(2) Least genetic diversity
(3) Absence of weeds
(4) Ecological succession

Changes in GnRH pulse frequency in females is
controlled by circulating levels of :-
(1) estrogen and progesterone
(2) estrogen and inhibin
(3) progesterone only
(4) progesterone and inhibin

Which of the following is not a feature of the
plasmids?
(1) Independent replication
(2) Circular structure
(3) Transferable
(4) Single - stranded

Which of the following features is not present in
Periplaneta americana ?
(1) Schizocoelom as body cavity
(2) Indeterminate and radial cleavage during
embryonic development
(3) Exoskeleton composed of N-acetylglucosamine
(4) Metamerically segmented body

In higher vertebrates, the immune system can
distinguish self-cells and non-self. If this property is
lost due to genetic abnormality and it attacks self-
cells, then it leads to :-
(1) Allergic response
(2) Graft rejection
(3) Auto-immune disease
(4) Active immunity

Match the terms in Column-I with their description
in Column-II and choose the correct option :
Column-I Column-II
a) Dominance (i)Many genes govern a
single character
(b) Codominance (ii)In a heterozygous
organism only one
allele expresses
itself
(c) Pleiotropy (iii)In a heterozygous
organism both alleles
express themselves
fully
(d)Polygenic (iv)A single gene
inheritance influences many
characters
a) (b) (c) (d)
(1) (ii) (i) (iv) (iii)
(2) (ii) (iii) (iv) (i)
(3) (iv) (i) (ii) (iii)
(4) (iv) (iii) (i) (ii)

Joint Forest Management Concept was
introduced in India during :
(1) 1960 s
(2) 1970 s
(3) 1980 s
(4) 1990 s

Pick out the correct statements :
a) Haemophilia is a sex-linked recessive disease
(b) Down's syndrome is due to aneuploidy
(c) Phenylketonuria is an autosomal recessive gene
disorder.
(d) Sickle cell anaemia is a X-linked recessive gene
disorder
(1) (a) and (d) are correct
(2) (b) and (d) are correct
(3) (a), (c) and (d) are correct
(4) (a), (b) and (c) are correct

Which one of the following statements is wrong ?
(1) Cyanobacteria are also called blue-green algae
(2) Golden algae are also called desmids
(3) Eubacteria are also called false bacteria
(4) Phycomycetes are also called algal fungi

Proximal end of the filament of stamen is attached
to the
(1) Anther
(2) Connective
(3) Placenta
(4) Thalamus or petal

Which of the following approaches does not give
the defined action of contraceptive ?
(1) Barrier prevent fertilization
methods
(2) Intra uterine Increase phagocytosis of
devices sperms, suppress sperm
motility and fertilizing
capacity of sperms
(3) Hormonal Prevent/retard entry of
contraceptives sperms, prevent ovulation
and fertilization
(4) Vasectomy Prevents spermatogenesis

The taq polymerase enzyme is obtained from :
(1) Thermus aquaticus
(2) Thiobacillus ferroxidans
(3) Bacillus subtilis
(4) Pseudomonas putida

Identify the correct statement on 'inhibin' :-
(1) Inhibits the secretion of LH, FSH and Prolactin.
(2) Is produced by granulose cells in ovary and inhibits
the secretion of FSH.
(3) Is produced by granulose cells in ovary and inhibits
the secretion of LH.
(4) Is produced by nurse cells in testes and inhibits
the secretion of LH.

Which part of the tobacco plant is infected by
Meloidogyne incognita ?
(1) Flower
(2) Leaf
(3) Stem
(4) Root