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8751.

Question : Select incorrect feature(s) from (a)-(d) regarding collenchyma tissue. (a) Living mechanical tissue (b) Absent in monocots (c) May be photosynthetic (d) Living non-mechanical tissue

Answer»

Only ( C )
Only ( d )
Both ( c ) & ( d )
Both ( a ) & ( B )

ANSWER :A
8752.

Question : Select incorrect pair w. r. t. animals and methods of breeding by which they were developed.

Answer»

KARAN Swiss - Cross breeding
Hisardale- cross breeding
Mule - cross breeding
HINNY - Interspecific hybridization

Answer :C
8753.

Question : Select from the following the one that is not the part of testis.

Answer»

TESTICULAR lobules
Sertoli cells
Primary follicles
Leydig cells

Answer :C
8754.

Question : Select false statement -

Answer»

In LEAVES, the ground tissue consists of thin walled chloroplast containing CELLS which is CALLED mesophyll
The stomatal aperture, guard cells and the surrounding subsidiary cells are together called stomatal apparatus
The root hairs are unicellular elongation of the epidermal cells.
The protophloem has bigger SIEVE TUBES whereas metaphloem has narrow sieve tubes

Answer :D
8755.

Question : Select false statement

Answer»

Lenticeis OCCUR in most woody trees
Bark is a non-technical term
Vascular CAMBIUM and cork cambium are EXAMPLES of lateral meristems
None of these

Answer :D
8756.

Question : Select correctly matched pair/pairs :- (a) Pteriodophyta – Lycopodium, Dryopteris (b) Gymnosperms – Ephedra, Gnetum (c) Bryophyta – Porella, Riccia

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Only a
Only a & c
Only B & c
All a, b & c

Answer :D
8757.

Question : Select correct statements for Equisetum. (i) Has underground stem rhizome. (ii) Produce microspores and megaspores (iii) Terrestrial with distinct compact structure of sporophylls (iv) Aquatic homosporous member

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I & iii
II & III
II & IV
I & III

Answer :D
8758.

Question : Select correct statements for algae. (i) They have thalloid body with adventitious roots. (ii) Form and size is highly variable. (iii) At least a half of the total CO_(2) fixation on earth is carried out by these organisms. (iv) Green algae and brown algae produce large amounts of hydrocolloids .

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I & III
I,II & III
II, III & IV
II & III

Answer :D
8759.

Question : Select correct statement w.r.t. thalassemia. (a) It is a recessive autosomal genetic defect. (b) Alpha thalassemia is connected to the deletion of 16p(short arm) chromosome. (c) Beta thalassemia is caused due to mutations in the HBB gene on chromosome 11. (d) About 30% of adult haemoglobin is made up of alpha and delta chains.(e) In beta thalassemia, excess B-chains form unstable tetramers which have abnormal oxygen dissociation curve.

Answer»

(b), (C) & (d)
(a), (b) & (E)
All except (b) & (e)
All except (d) & (e)

ANSWER :D
8760.

Question : Select correct statement w.r.t. florigen.

Answer»

It is FORMED in leaves and shoot apeices
When exposed to the INDUCTIVE PHOTOPERIOD florigen migrates from leaves to shoot apex
Initial FLOWERING occurs without migration of florigen to the shoot apex
It is not a PLANT hormone

Answer :B
8761.

Question : Select correct statement w.r.t. hard walled berry.

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Multiseeded FRUIT DEVELOPING from superior ovary.
EDIBLE part is juicy unicellular hairs
Develops from `Goverline(3)`
Develops from `Gunderline(3)`

ANSWER :C
8762.

Question : Select correct option w.r.t. trisomy aneuploidy

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Down's SYNDROME
Klinefeller's syndrome
turner's syndrome
All EXCEPT (3)

ANSWER :D
8763.

Question : Select correct option w.r.t. heterogametes of algae. Cladophora, Chlamydomonas, Fucus, Ulothrix, Volvox, Chara, Spirogyra

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5
6
2
3

Answer :D
8764.

Question : Select correct option among the given statements regarding true and false. (a) Nicotine reduces the concentration of haembound oxygen, br (b) Nicotine raises blood pressure and increases heart rate, br ( c ) Smoking is associated with increased incidence of cancers, br (d) Smoking causes oxygen deficiency only in the lungs.

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(a)T, (B)T, ( C)T, (d)T
(a) T, (b) F, (c ) T, (d) F
(a) F, (b) F, (c ) T, (d) T
(a) T, (b) T, (c ) T, (d) F

Answer :D
8765.

Question : Select an incorrect statement regarding experiments of Oswald Avery, Colin MacLeod and Maclyn McCarty to determine the biochemical nature of 'transforming principle' in Griffith's experiment

Answer»

They purified BIOCHEMICALS (PROTEINS, DNA, RNA, etc) from the heat-killed S cells to SEE which ones could transform live R cellsinto S cells
They discovered that DNA ALONE from S bacteria caused R bacteria to become transformed
They discovered that proteases and RNases promoted transformation
Digestion with Dnase inhibited transformation, suggesting that the DNA caused the transformation.

Answer :D
8766.

Question : Select an incorrect statement regarding cortex

Answer»

Cortex is the main zone which lies between the epidermis and endodermis
In monocotyledonous stem and cortex of root the cells in this zone are predominantly parenchymatous.
In the leaves the ground tissue, consisting of thin walled chlorenchyma is called mesophyll.
the DICOTYLEDONOUS stems the cortex is usually DIFFERENTIATED into the following three sub-zones hypodermis, general cortex, and endodermis.

Solution :Cortex is the main zone which lies between the epidermis and PERICYCLE.
8767.

Question : Select an incorrect statement regarding transpiration / stomata

Answer»

Water STRESS RESULTS in decline of growth in plants. 
The water lost from LEAF cells creates root pressure 
Stomatal pores open into the INTERCELLULAR spaces of the leaf 
Evaporation causes COOLING of leaves.

Answer :B
8768.

Question : Select an incorrect statement w.rt. flower.

Answer»

 AFLOWER may be trimerous, TETRAMEROUS or PENTAMEROUS.
 Bracts are reduced leaf found at the base of receptacle.
ZYGOMORPHIC flower have bilateral symmetry.
Asymmetric flower are called irregular.

Answer :2
8769.

Question : Select an incorrect statement for transport of water in plants

Answer»

Long DISTANCE transport of substances can be explained by diffusion
 Mass FLOW is the movement of substances in BULK or en MASSE as a RESULT of pressure differences
Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient
Diffusion is a slow process.

Answer :A
8770.

Question : Select an incorrect statement for Liliaceae family.

Answer»

Leaves - mostly BASAL, ALTERNATE, exstipulate
Gynoecium-tricarpellary, syncarpous, OVARY superior
 Seed - non-endospermous
 Flower - bisexual, actinomorphic

Answer :3
8771.

Question : Select an incorrect statement for cereal seeds.

Answer»

 Seed coal is MEMBRANOUS.
 Endosperm is bulky and stores food.
The EMBRYO is very large and SITUATED in a groove at one END of the endosperm.
The outer covering of endosperm SEPARATES the embryo by a proteinous layer called aleurone layer.

Answer :3
8772.

Question : Select an incorrect statement about bryophytes ?

Answer»

They play an important role in plant succession on bare ROCKS`//` soil.
The plant body of BRYOPHYTES is more differentiated than that of algae
The main plant body of the bryophyte is DIPLOID and is CALLED a gametophyte.
Bryophytes are also called amphibians of the plant kingdom.

Answer :C
8773.

Question : Select an incorrect statement for Gynoecium.

Answer»

In LOTUS and rose apocarpous ovary is PRESENT.
 In mustard and TOMATO syncarpous ovary is present
 After fertilization, the avules DEVELOP into fruits and the ovary matures into a seed.
Stigma is usually at the tip of the style

Answer :3
8774.

Question : Select an incorrect statement

Answer»

LOW TEMPERATURE INACTIVATES photosynthetic
different habitats shows same RESPONSE of phtosynthesis to a given TEMPERTURE
affinity of the enzyme rubisCO for `CO_(2)` is reducedat highertemperature
photosynthesis is senitive to higher emperature primarily becauseof the fact that athigher temperatures enzymes becomsinactive

Answer :B
8775.

Question : Select an incorrect statement.

Answer»

 In majority of the dicotyledonous plants, the direct elongation of the radical leads to the formation of primary root.
 Tap root system is SEEN in the MUSTARD plant.
In some plants, like grass, banyan tree, adventitious ROOTS are not found.
In monocotyledonous plants, the primary root is short lived.

Answer :3
8776.

Question : Select an incorrect match

Answer»


ANSWER :4
8777.

Question : Select an correct statement regarding experiments of Oswald Avery, Colin MacLeod and Maclyn McCarty

Answer»

They concluded that DNA is the hereditary material, but not all biologists were convinced
They PURIFIED biochemicals (proteins, DNA, RNA, etc.) from the heat-killed R cells to see which ones COULD transform LIVE R cells into S cells
They discovered that proteases and RNases did AFFECT transformation
They discovered that DNA alone from R bacteria caused S bacteria to BECOME transformed.

Answer :A
8778.

Question : Select an incorrect match.

Answer»

cpipetalous - brinjal
epiphyllous - LILY
 moncadelphous - CHINA rose
diadelphous - CITRUS

ANSWER :4
8779.

Question : Select a plant which is not a biennial from the following

Answer»

CARROT
rice
cabbage
SUGARBEET

ANSWER :B
8780.

Question : Select a Plant which does not exhibit heterophylly from the following?

Answer»

DELPHINIUM
Ranunculus
Coriandrum
PISUM

ANSWER :D
8781.

Question : Select a palindrome sequence from the following

Answer»

AC GC
TC CG
TA AC
AT TC
AT CT
AT GA
AA TT
TT AA

Answer :D
8782.

Question : Selcet correct answer according to code1,2,3 correct ,1 and 2 correct2 and4 correct ,1 and 3 correct.What is true for archaebacteriaExtreme halophiles,extreme thermophiles, Methanogens, Occur- rence of peptidoglycan in cell wall.

Answer»

(A)
(B)
( C)
(D)

ANSWER :A
8783.

Question : Select a bio-control agent from the given microbes:

Answer»

Bacula virus
Rhino virus
Picrona virus
Adeno virus

Answer :A
8784.

Question : Selaginella and Salvinia are considered to represent a significant step forward evolution of seed habit because:-

Answer»

Embryo develops in FEMALE gametophytes which is retained on parent sporophyte
Female gametophytes is FREE nad GETS dispersed like seeds.
Female gametophytes lacks archaegonia
Megaspores posses endosperm and embryo SURROUNDED by seed coat.

ANSWER :A
8785.

Question : Selaginella a pteridophyte shows some advances towards the seed habit. Consider the following statement. I. Development and retention of embryo inside megasporangium. II. Homospory. III. Formation of serveral megaspores within a megasporangium . IV. Enhancement in the size of male gametophyte. Choose the incorrect statements with regard to prerequisites for seed habit .

Answer»

I and III
I and IV
II, III and IV
NONE of these

ANSWER :C
8786.

Question : Segments with a serial repetition of atleast some organ. This phenomenon is called

Answer»

Metagenesis
Metamerism
Division
Repetition

Answer :B
8787.

Question : Segments of lagging strand formed during DNA synthesis are

Answer»

POLYMERASE FRAGMENT
RNA fragment
OKAZAKI fragments
Epimerase activity

ANSWER :C
8788.

Question : Segments of antigen that are recognised by antibody are

Answer»

MEMORY regions
epitopes
non-determinants
self-limitation

Answer :B
8789.

Question : Segment A : The region proximal to region of elongation in a root, bears root hairs. Segment B : The region distal to region of maturation is responsible for the growth of the root in length.

Answer»

Both STATEMENTS A and B are incorrect
Both statements A and B are correct
Only STATEMENT A is correct
Only statement B is correct

Answer :B
8790.

Question : Segeration of genes take place during

Answer»

Metaphase
Anaphase
Prophase
Embryo formation

Answer :B
8791.

Question : Seeds with enlarged and persistent endosperm are called_____.

Answer»


ANSWER :ALBUMINOUS
8792.

Question : Seeds respire in

Answer»

Presence of `O_(2)`
presence of `CO_(2)`
ABSENCE of `O_(2)`
both 1 and 3

ANSWER :D
8793.

Question : Seeds which cannot tolerate drying and freezing tempetaure are called______________seeds.

Answer»


ANSWER :A::C
8794.

Question : Seeds of Cinchona are dispersed by

Answer»

Wind because they are very small and light
Wind because they are WINGED
WATER because they POSSESS aerenchyma
ANIMALS as they have barbs

Answer :B
8795.

Question : Seeds are product of sexual reproduction as they are produced by:

Answer»

FUSION of gametes
Siphonogamy
Ovules
Embroy sac

Solution :N//A
8796.

Question : Seeds are formed in angiosperms when male and female gametes get fused. But in some plants seeds are produced without the fusion of gametes. Name the process.

Answer»

SOLUTION :APOMIXIS
8797.

Question : Seedless watermelons are produced by crossing between :

Answer»

TRIPLOID FEMALE plant with diploid male plant
diploid female planta with TETRAPLOID male plant
Tetraploid female plant with tertraloid male plant
tetraploid female plant with tetraploid male plant

Answer :A
8798.

Question : Seedles grapes are produced due to or Seedles fruits in Vits are formed due to

Answer»

Parthenocarpy
Crossing over
Parthenogenesis
None of these

Solution :STIMULATIVE parthenocarpy OCCURS with stimulus of POLLINATION e.g., GRAPES
8799.

Question :Seedless fruits can be developed by treating the unpollinated ovaries with

Answer»

auxins
colchicine
SUCROSE SOLUTION

ANSWER :A
8800.

Question : Seedles fruit in banana is produced because of

Answer»

ASEXUAL reproduction
Parthenogenesis
Triploid
Cross pollination

Solution :Banana is NATURAL parthenocarpy fruit FORMED WITHOUT FERTILIZATION of ova.