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3401.

Question : Homologous organs are different form analogous organs. (i) Mention the two basic characteristics that decide about analogy and homology between the two organs. (ii) On what basis is the classification of organisms into prokaryotic and eukaryotic done?

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Solution :(i) The two basic characteristics that DECIDE about analogy and homology are origin structures and function.
(ii) In prokaryotic ORGANISM no TRUE NUCLEUS is found.
Therefore, nucleus is absent.
In EUKARYOTIC organisms true nucleus is found.
3402.

Question : Homologous organs are :

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DISSIMILAR ORIGIN and dissimilar STRUCTURE
Dissimilar origin but SIMILAR function
Similar origin with similar or dissimilar function
Similar origin with dissimilar function.

Answer :C
3403.

Question : Homo sapiens belong to order called

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chiroptera
primates
rodentia
Cetacea

Answer :B
3404.

Question :HIV Virus: ELISA: Leukaemia:.............

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SOLUTION :BLOOD CANCER
3405.

Question : Higher radiation of X-rays can cause………….

Answer»
3406.

Question : Heterotrophs

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SOLUTION :RABBIT, LION
3407.

Question : Heterosis is

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HYBRID incompatibility
hybrid VIGOUR
STRUCTURAL hybridity
hybrid sterility

Answer :B
3408.

Question : Heredity is opposed by

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VARIATION
ENVIRONMENT
GENES
NONE of the above

Answer :A
3409.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. How will mining in that piece of land affect people of the area?

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Solution :Mining devastes the environment.
1) This destroys the natural habitats of PLANTS and animals.
2) During mining, TOXIC chemicals are RELEASED. They pollute the air and water.
3) People like fisherman may lose their livelihood.
3410.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. Will the villagers be benefited by the rich minerals extracted from sand ?

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Solution :1) No, the VILLAGERS will not be benefited by the rich minerals extracted from sand.
2) But some may GET EMPLOYMENT for a short period.
3411.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. Does the government have any role to play ?

Answer»

Solution :1) Government's ROLE is VEY important in this regard.
2) It has to make some LAWS to protect the beaches and their biodiversity.
3) These laws should be implemented very carefully.
3412.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. What resources are the villagers trying to save by their agitation ?

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Solution :1) Villagerscan SAVE the biodiversity of the areaby agitating.
2) They can save trees like mangrove and ANIMALS like turtles, gharials (a SPECIES of crocodiles) etc.
3413.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. Why does the private company want to carry out mining in the area ?

Answer»

Solution :Private company WANTS to carry out mining in the AREA for their benefits, they want to earn MONEY.
3414.

Question : Here is a news strip, read it carefully and answer the following questions. Villagers oppose sand mining project Santhabommali (Srikakulam) : People of more than 20 villages in two mandals of Srikakulam have raised a banner of revolt against the proposed beach sand mining project by a private company and threatened to intensify their agitation if the government does not cancel the project. The sand mining is being taken up to extract rich minerals from the area. The villages are located around the forest belt were mining was initiated. Do you think the villagers are doing a right thing to agitate ? Why ?

Answer»

Solution :Yes, the villagers are doing a right thing to agitate. Because beach sand mining leads to certain problems such as -
1) Destruction of NATURAL beaches and the ecosystems.
2) Habitat loss for GLOBALLY important SPECIES such as turtles, shore BIRDS, ETC.
3) Reduced protection from storms, tsunamis and wave events.
3415.

Question : Hepatic portal system starts from

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DIGESTIVE SYSTEM to liver
KIDNEY to liver
liver to heart
liver to kidney 

ANSWER :A
3416.

Question : Heparin in blood is released from

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clumped platelets
mast-cell granules
non-granulocytes
granulocytes 

ANSWER :B
3417.

Question : Hensen's disc is the other name of

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H - zone
A - BAND
I - band
Z - line

Answer :A
3418.

Question : Hedgehog is included under

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prototheria
eutheria
reptilia
aves 

ANSWER :B
3419.

Question : Heartbeat depends upon

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SIZE of the animal
physical activity
pacemaker
All of the above

Answer :d
3420.

Question : Heart pumps only impure blood in case of

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sharks
whale 
lizard
frog 

ANSWER :A
3421.

Question : Heart of fish pumps _____ blood, whereas the heart of bird pumps _____ blood.

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SOLUTION :DEOXYGENATED , OXYGENATED
3422.

Question : Hearing is controlled by

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TEMPORAL LOBES
cerebrum
hypothalamus
parietal LOBE

ANSWER :A
3423.

Question : Hear is situated in the middle of the _____ cavity

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SOLUTION :THORACIC
3424.

Question : he start button is present in the .................. corner of the computer.

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Center
top
LEFT
right

SOLUTION :left
3425.

Question : Haversian system is typically found in bones of

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fishes
aves
reptiles
mammals

Answer :D
3426.

Question : Harmful effect of SO_(2) on plants include:

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Protein destruction
PLASMOLYSIS
CHLOROPHYLL destruction
GOLGIBODY destruction

Answer :C
3427.

Question : Haemoglobin levels in the blood samples of two persons A and B are found to be 9 gm/dL and 13 gm/dL respectively. Which statement is true with respect to the amount of oxygem supply in their body?

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More in PERSON B than in person A
More in person A than in person B
Equal in person A and person B
No RELATION between OXYGEN supply and the level of haemoglobin

Answer :A
3428.

Question : Haemoglobin is found in

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all invertebrates
only in vertebrates
EARTHWORM and rabbit
cockroach and earthworm 

ANSWER :C
3429.

Question : Habitats of …………. and ………….. Are under threat in Assam in the Manas Sanctuary.

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3430.

Question : Habitat destruction cause loss of wild life.

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ANSWER :TRUE
3431.

Question : What is a Habitat ?

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Solution :The place where ORGANISMS live and PROSPER is called as HABITAT. It is a DWELLING place of an organism.
3432.

Question :H. Harris and J.F. Watkins in 1965 first time reported the fusion of following cell lines to form hybrids

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MOUSE and man
mouse and HAMSTER
mouse and CHICK erythrocytes
mouse and Drosophila

Answer :A
3433.

Question : Gymnosperms generally lack

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XYLEM tracheids and sieve TUBES in the phloem
xylem vessels and sieve tubes in the phloem 
xylem vessels and COMPANION CELLS in the phloem
xylem tracheids and companion cells in phloem 

Answer :C
3434.

Question : Gymnosperms can show polyembryony. Why do you think so?

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SOLUTION :Have TWO or more ARCHEGONIA, so POLYEMBRYONY can OCCUR.
3435.

Question : Gustatoreceptors lie

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on the TONGUE
in the NOSE
in the ear
in the EYES

ANSWER :a
3436.

Question : Guniea pig having black colour when crossed with guinea pig having same colour produced 80 offsprings, out of which 60 were black and 20 were whie. Now, find out a] What is the possible genotype of the guinea pigs? b] Which traits is dominant and which traits is recessive? c] What is this cross called as and what is its phenotypic ratio?

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Solution :a] `Bb xx Bb`
b] Black is dominant and WHITE is RECESSIVE,
C] Monohybrid cross, phenotypic ratio=3:1
3437.

Question : Guard cellsare responsiblefor openingandclosing ofthestomata

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Solution :Guard cells are responsible for the OPENING and closing of stomata because, during transpiration, the MOVEMENT of ions (Potassium) in and out of the guard cells causes the opening and closing of Stomata. When the water moves inside the guard cells, causing them swell up and BECOME TURGID making the stomata open. When guard cells cause water to move out of the cell and make guard cells SHRUNK and stomata pores close.
3438.

Question : Growth of facial hair and deepening of voice are symptoms of puberty in boys. Which harmone is responsible for it ?

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SOLUTION :TESTOSTERONE.
3439.

Question : Growth hormone is secreted by the

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ANTERIOR LOBE of the PITUITARY
POSTERIOR lobe of the pituitary
adrenal GLAND
gonads

Answer :A
3440.

Question : Gregarious, Thorax, Abdoment, Pinnae.

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SOLUTION :GREGARIOUS
3441.

Question : Green plants are called autotrophs.

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Solution :(i) Green plants absorb solar energy.
(ii) In the sunlight, they perform PHOTOSYNTHESISIN which the food in the form of glucose is synthesized.
(iii) Thus, these organisms can manufacture and utilize the food they make.
(iv) The food they prepare is not only used by them BUTCAN be made avilable to the entire biological world, hence are CALLED producers.
(v) Green plants do not DEPEND on OTHERS for food and hence, they are called autotrophs.
3442.

Question : Green plants are __________ which use simple materials as raw materials to prepare their own food.

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SOLUTION :AUTOTROPHS
3443.

Question : Green pigments that are capable of trapping sunlight energy are located in

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ER
cell wall
chloroplast
ribosomes

Solution :N/A
3444.

Question : Green muffler is related to pollution of

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AIR
WATER
SOIL
NOISE

ANSWER :D
3445.

Question : Green house effect refers to

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COOLING of EARTH
trapping of UV rays
cultivation of plants
WARMING of Earth

SOLUTION :warming of Earth
3446.

Question : Green glands are found in

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scorpion
moth
cray fish
spider 

ANSWER :C
3447.

Question : Green and red colour of seeds are recessive and dominant traits respectively. Out of F1 and F2, in which generation will the green seed appear, if both parents are not hybrid. Explain giving reason.

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SOLUTION :Since it is given that GREEN is recessive and red seeds are dominant, HENCE green colour of seeds will reappear only in F2 generation
This is because, both parents are not hybrid for this trait, (as given) and hence the two recessive genes will come together only in F2.
3448.

Question : Grasshopper is a primary consumer.

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Solution :(i) The organisms which FEED exclusively on producers ar called primary CONSUMERS.
(II)GRASSHOPPER can not produce its own food.
(iii) It feeds on grass and other green plants only.
(iv) Hence, grasshopper is a primary CONSUMER.
3449.

Question : Grasshopper, Snake, Frog, Grass, Eagle.

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Solution :Grass `to`GRASSHOPPER `to`FROG `to`Snake `to`Eagle
3450.

Question : Graph/diagram based question : Which of the following graph is correct for Burning of fossil "fuel"rarr"level" of air pollution ?

Answer»


ANSWER :IV