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7601.

Question : Study carefully the following figure representing greenhouse effect. Select the correct statements regarding this.

Answer»

Much of the long wavelength infrared RADIATIONS reradiated by the EARTH's surface are absorbed by the atmospheric GREENHOUSE gases.
`CO_(2), CH_(4), CFCs " and " N_(2)O` are the gases which are responsible for greenhouse effect.
The atmosphere is transparent to the incoming short-wavelength radiations and is TRANSLUCENT to the long-wavelength infra-red radiations.
All of these

Solution :N//A
7602.

Question : Studensts involved in nature club activity found some inter specific interactions between organisms in a garden pea. They made table of interaction giving + for beneficial - for detrimental and 0 for neutral interactions. (A) Give name of interactins in each case. (B) Explain how parasitism differs from predation (C ) Give significance of species interaction

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Solution :(A) (1) Mutualism (2) Competitions (3) Commensalism(4) Amensalism
(B) In PARASITISM two organsims are co-evolving with each other with their sepcial mechanisms. But in predation one organim ocmpletely destroys or kills the other.
(C ) Organisms cannot live isolaed in natures, they are inter dependent for various WAYS to FORM biological community form biological community.
These interactions MAY be of three types:
(1) beneficial (2) detrimental (3) neutral interactions
7603.

Question : Students involved in nature club activity found some inter specific interactions between organisms in a garden pea. They made table of interaction giving + for beneficial - for detrimental and 0 for neutral interactions.Name the type of interaction between these organisms.

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SOLUTION :(1) Mutualism - Lichens
(2) Competition - Flamingoes and FISH COMPETING for zooplanktons
(3) Parasitism - Loranthus and Mango tree/ Cuscuta on hedge plant
(4) COMMENSALISM - Epiphyte on host
7604.

Question : Stucsiblestrcture presentoverthe scolexof tapeworm is

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Rosellum
Sucker
Proglottis
Aurricle

Answer :C
7605.

Question : Explain the concept of struggle for existence.

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Solution :Struggle for exitence is ONE of the principles in the theory of nutural selection as proposed by Drawin.Individuals multiply in geometric ratio but the spce and food remain constant.This leads to competition for SURVIVAL of life.This competition is called struggle for exitence.The struggle may be intraspecific,interspecific or environmental.(1)Intraspecific struggle:Intraspecific struggle is the competition among the individuals of the same species.This is a severe struggle because the need and approach of all competing organisms is similar,e.g.,struggle between two herbivore animals for getting grass.(2)Interspecific struggle: Interspecific struggle is the struggle between the organisms of different species living together,Individuals of one species compere with the other species for food shelter and breeding places,e.g., a parasite and host or a predator and prey show interspecific struggle.(3):Environmental struggle:Environmental struggle is struggle shown by all living forms aganist ADVERSE environmental condition or against natural CALAMITIES like extreme heat or cold,DROUGHT,stroms,earthquakes,volcanic eruptions,etc.
7606.

Question : Struggle between cow and deer for getting grass is called ……… .

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inter-specific struggle
environmental struggle
struggle against NATURAL calamities
intra-specific struggle

Answer :A
7607.

Question : Struggle between cow and cow for getting grass is called ……….. .

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INTERSPECIFIC struggle
environmental struggle
struggle against NATURAL calamities
intraspecific struggle

Answer :A
7608.

Question : Struggle between cow and cow for getting grass is called …….

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inter-specific
ENVIRONMENTAL STRUGGLE
struggle agaiost NATURAL calamaities
inra-specific struggle

SOLUTION :(d ) INTRA -sspecific struggle
7609.

Question : Struggle between cow and cow for getting grass is called ……… .

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INTERSPECIFIC struggle
environmental struggle
struggle against NATURAL calamities
intraspecific struggle

Answer :D
7610.

Question : Structures for disperal of spores in bryophyta are :-

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ELATERS
PSEUDOELATERS
Peristomial TEETH
All the abvoe

ANSWER :D
7611.

Question : Structure, which lies at the upper of the two labia minora ?

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MONS PUBIS
Labia majora
CLITORIS
HYMEN

ANSWER :C
7612.

Question : Structure which guides the pollen tube towards micropyle of ovule ………..

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SOLUTION :OBTURATOR
7613.

Question : Structure of maize grain is given below. Label the parts. A, B, C, D

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SOLUTION :A. EndospermB. ScutellumC. ColeoptileD. COLEORRHIZA
7614.

Question : Structure of HIV.

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SOLUTION :
7615.

Question : Structure of ovum.

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SOLUTION :
7616.

Question : Structure of an antibody

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SOLUTION :
7617.

Question : Structure of chromosome.

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SOLUTION :
7618.

Question : Structure of a Pea Flower

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SOLUTION :
7619.

Question : Structure equivalent to perianth is

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SUPERIOR palea
Inferior palea
Glumes
Lodicules.

Answer :D
7620.

Question : Structure formed by the joining of many mammary ducts is connected to

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MAMMARY ampulla
Mammary tubules
Lactiferous duct
Nipple

Answer :C
7621.

Question : Structure, composition and characteristics of soil together constitute_____ factor.

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ANSWER :EDAPHIC
7622.

Question : Structure absent from fresh frozen blood plasma

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Immunoglobin
Plasma
Albumin
Platelet

Answer :D
7623.

Question : Structural genomics includes

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GENETIC mapping
Physical mapping
Sequencing
All the three

Answer :D
7624.

Question : Structural lipids of cell membrane are:

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SIMPLE lipid
Chromolipids
Steroid
Phospholipids

Answer :D
7625.

Question : Structural genes and their operator.

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ANSWER :OPERON
7626.

Question : Structural gene of eukaryotes differ from prokaryotes. How?

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Solution :In eukaryotes, the structural gene is monocistronic CODING for only ONE PROTEIN whereas in PROKARYOTES the structural gene is polycistronic coding for MANY proteins.
7627.

Question : Structural DNA that organizes the structure of chromosome, is located in

Answer»

CENTROMERE
TELOMERE
Satellites
All the three

Answer :D
7628.

Question : Structural changes in the chromosomes usually occurs due to errors in______

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SOLUTION :CELL DIVISION
7629.

Question : Structural differences among individuals which make them either fit or unfit in the struggle for existence can be expressed by term_____

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ANSWER :VARIATION
7630.

Question : Structural component of cytochrome oxidase is

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Zinc
Copper
Molybdenum
Magnesium

Answer :B
7631.

Question : Strongest ligament connects :-

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SCAPULA to humerus
Ilium to femur
Femur to tibia
Humerus to ulna

Answer :B
7632.

Question : Strong sharp spines that get attached to animlas feet are found in the fruits of

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ARGEMONE
medicago
martynia
ecballium

ANSWER :C
7633.

Question : Strong, sharp spines that get attached to animal's feet are found in the fruits of

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ARGEMONE
Ecballium
Heritier
Crossandra

Solution :Argemone
7634.

Question : Strong neural signals from the pneumatic centre

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INCREASE the RESPIRATORY axis
increase the DURATION of respiration
Decrease the duration of respiration
Both 1 and 2

Answer :D
7635.

Question : Stroma in the chloroplasts of higher plant contains:

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Light-dependent REACTION enzymes
Ribosomes
Chlorophyll
Light-independent reaction enzymes

Answer :D
7636.

Question : Stroma of chloroplast is associated with

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OEC
Dark PHASE
Non-cyclie ELECTRON transport
Cyclic electron transport

ANSWER :B
7637.

Question : Stroma in the chloroplasts of higher plants contain

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Light-indepedent REACTION ENZYMES
Light-dependent reaction enzymes
PIGMENTS
CHLOROPHYLL

ANSWER :A
7638.

Question : Striped muscles are

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Syncytial
Uninucleate
Binucleate
Anucleate

Answer :A
7639.

Question : Strict conditions are to be followed in medical termination of pregnancy (MTP) procedures. Mention two reasons.

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Solution : In MTP strict restrictions due to two following REASONS observed :
(a) To get rid of UNWANTED pregnancies. (b) When foetus is suffering from disabilities or incurable disease or when CONTINUATION of the PREGNANCY could be harmful to even fatal either to the mother or to the foetus or both.
7640.

Question : Strict protection of biodiversity hotspots could reduce ongoing mass extinctions by almost

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0.3
0.15
0.1
0.05

Answer :A
7641.

Question : Striated muscles contract by

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Sliding of ACTIN filament upon MYOSIN filaments
Sliding of myosin filament upon actin filaments
Pulling TOGETHER of myosin filaments
Pulling together of actin filaments

Answer :A
7642.

Question : Striated muscles are

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Multinucleate and NUCLEI are peripheral in position
Multinucleate and NUCLEUS is CENTRAL in position
Multinucleate and nuclei are central in position
Uninucleate and nucleus is peripheral in position

ANSWER :A
7643.

Question : Streptomycin is obtained from

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STREPTOMYCES aurefaciens
Streptomyces venezuelae
Streptomyces griseus
Streptomyces ramosus

Answer :C
7644.

Question : Streptomycin is obtained from(A) Streptomyces griseus(B) S.aurofaciens(C) S.venezualae(D) S.ramosus

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STREPTOMYCES griseus
S.aureofaciens
S.venezualae
S.ramosus

Solution :Streptomyces griseus
7645.

Question : Streptokinase (TPA) helps in:

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CLEARING BLOOD clots
increasing plasma
dissolving tissues
increasing O.P. of cell

Answer :A
7646.

Question : Streptobacillus converts milk into curd.

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ANSWER :LACTOBACILLUS
7647.

Question : Streptococcus lactic is responsible for curdling of milk.

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True
False

Answer :LACTOBACILLUS ACIDOPHILUS
7648.

Question : Streaming movement of cytoplasm.

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ANSWER :CYCLOSIS
7649.

Question :Stratosphere is mainly depleted by.............

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EXCESS CO
CFC's
Ozone
Excess `CO_2`

SOLUTION :Excess CO
7650.

Question : Stratification occurred in

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TROPICAL
DECIDUOUS forest
DESERT
Both (a) and (B)

Answer :D