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21301.

Question : After abicission, outer layer of cells becomes .............. by periderm.

Answer»

LIGNIFIED
Pectinised
Suberized
STRATIFIED

SOLUTION :Suberized
21302.

Question : After a long deep breath, we do not respire forsome second due to

Answer»

more` CO_(2)` in the blood
more`CO_(2)`in the blood
less `CO_(2)` in the blood
less `CO_(2)` in the blood

Answer :B::C::D
21303.

Question : After a forest fire, when above ground plant parts are killed ferns are often one first plantsto appear ? Why ?

Answer»

Solution :1. On the Forest floor, ferm stems LIVE safely TUCKED below the GROUND.
2. They survive moderate fires even if all fronds are burnt away.
3. Once rains come and light is availble, and when nutrients get released after the fire, new fronds are produced easily.
4. Thus ferns are often the first plants to GROW after a fire.
21304.

Question : Afferent processes of neuron are

Answer»

dendrites
axons
axon terminals
synapse 

ANSWER :A
21305.

Question : Afferent neurons carry impulses from _ to_

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CNS to RECEPTOR 
RECEPTORS to CNS
PNS to receptor
All the above 

ANSWER :B
21306.

Question : Afferent nerve fibre carries impulses from

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EFFECTOR to central neural SYSTEM
receptor to central neural system
central neural system to muscle
central neural system to receptors.

Solution :The sensory nerves that carry IMPULSES from the receptors to CNS are called afferent NERVE fibres.
21307.

Question : Afferent arteriole, Henle'sloop, vasa rectae,efferent arteriole.

Answer»


Answer :HENLE's LOOP (REST are blood vessels)
21308.

Question : Aestivation of petals in the flower of cotton is correctly shown in

Answer»




ANSWER :D
21309.

Question : Aestivation :

Answer»

SOLUTION :The mode of ARRANGEMENT of SEPALS or petals in floral bud with respect to the other members of the same whorl is known as AESTIVATION.
21310.

Question :Aestivation and placentation in a flower are observed with the help of

Answer»

FLORAL FORMULA
Floral DIAGRAM
Both floral diagram and floral formula
None of the above

ANSWER :B
21311.

Question : Aeroponics and hydroponics

Answer»

Solution :GROWING of PLANTS in the mist of MINERALS in air is called aeroponics, while growing of plants on liquid medium is called HYDROPONICS
21312.

Question : Aerobicrespiratorypathway is appropriatelytermed:

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CATABOLIC
PARABOLIC
Amphibolic
Anabolic

ANSWER :C
21313.

Question : Aerobic respiration is performed by :

Answer»

GLYCOSOMES
MITOCHONDRIA
LYSOSOMES
CHLOROPLAST

SOLUTION :mitochondria
21314.

Question : Aerobicrespirationproducesmoreusablechemicalenergythanfermentation because fermentationinvolves

Answer»

formationoflactic acid
completeoxidationof food
partial oxidation offood
evolution of `CO_(2)` andalcohol

Answer :C
21315.

Question : Aerobicrespiration and Anaerobicrespiration

Answer»

SOLUTION :`{:("Aerobic Respiration ","Anaerobic Respiration "),("(1) " O_(2) "is utilised in thisrespiration ","(1) " O_(2) " is not used in this respiration"),("(2) Complete combustion of respiratory substrates is done","(2) Incomplete combustion of "),("(3) Three PHASES are included Krabes. cycle, Glycolysis, Oxidative ","(3) PROCESS occursin only one phase Glycolysis "),("(4) More energyis released (38 ATP)","(4) Less energy is produced (2 ATP) "),("(5) " CO_(2) and H_(2)O " are as PRODUCT","(5) Ethanol + CO_(2) "or lactic acid are there as product"):}`
21316.

Question : Aerenchyma is a specialised parenchyma occuring in aquatic plants.

Answer»


ANSWER :TRUE
21317.

Question : Aerial stem modification found in Bougainvillea

Answer»

SPINE
Thorm
TENDRIL
HOOK

ANSWER :B
21318.

Question :Aerenchyma is found in :

Answer»

lithophytes
XEROPHYTES
HYDROPHYTES
SCIOPHYTES

SOLUTION :hydrophytes
21319.

Question : Aerating pores present in the cork.

Answer»

SOLUTION :LENTICELS
21320.

Question : Aedes mosquito is the vector for pathogens of

Answer»

MALARIA, filariasis
CHIKUNGUNYA, Dengue fever
Yellow fever, Malaria
Cholera, TYPHOID

Answer :B
21321.

Question : Adventitious roots which develop in clusters from the baseof the stem and nodes of the creeping stems, such as grasses, are called :

Answer»

STILT ROOTS
EPIPHYTIC roots
prop roots
FIBROUS roots

SOLUTION :fibrous roots
21322.

Question : Adventitious roots originate directly from the radicle.(True/false)

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ANSWER :FALSE
21323.

Question : Adventitious roots are found in A) Monstera B) Banyan tree C) Mango tree

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B & C
A & B
B only
A only

ANSWER :B
21324.

Question : Adventitious roots absorb moisture from atmosphere in

Answer»

Cuscuta
AVICENNIA
VANDA
STRIGA

Answer :C
21325.

Question : Adventitious buds produce adventitious roots in the leaves of

Answer»

Nepenthes
ACACIA
BRYOPHYLLUM
Allium

ANSWER :C
21326.

Question : Advantage of cleistogamy is

Answer»

no DEPENDENCE on POLLINATORS
VIVIPARY
HIGHER genetic variability
more vigorous offspring

Answer :A
21327.

Question : Adult human RBCs are enucleate. Which of the following statement (s) is/are most appropriate explanation for this feature ? (1) They do not need to reproduce (2) They are somatic cells (3) They do not metabolise (4) All their internal space is available for oxygen transport.

Answer»

Only (1)
(1),(3) and (4)
(2) and (3)
only (4)

ANSWER :D
21328.

Question : Adrenergic nerves fibres release the following chemical at synapse

Answer»

acetylcholine
nor-adrenaline
acetyl CoA
ADH

21329.

Question : Adrenocorticotropic hormone is secreted by

Answer»

thyroid
Adrenal cortex
pancreas
ANTERIOR pituitary.

SOLUTION :Adrenocortiocotropic HORMONE is SECRETED by anterior pituitary. This hormone stimulates adrenal CORTES to secrete its hormones.
21330.

Question : Adrenals are located above

Answer»

stomach
liver
pancrease
kidney.

Solution :Our BODY has ONE pair or ADRENAL GLANDS, one each at the anterior end of both kidneys.
21331.

Question : Adrenal medullary hormones can also increase ......... output.

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ANSWER :CARDIAC
21332.

Question : Adrenaline directly affects

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S.A node
B-cell of langerhans
Dorsal ROOT of SPINAL cord
Epithelial cells of stomach

Answer :A
21333.

Question :Administration of this substance before radiation therapy kills most of the cancer cells

Answer»

GADOLINIUM
2-deoxyglucose
flouro-deoxyglucose
strontium sulphate

Answer :D
21334.

Question :Adjacent epithelial cells are held together by desmosomes.

Answer»


ANSWER :TRUE
21335.

Question : "Adipose tissue forms a very prominent component of skin in mammals living in polar regions" State the reason

Answer»

SOLUTION :It PREVENTS HEAT loss by FORMING a heat - insulating layer below the skin
21336.

Question : (a)Differentiate between :-Actinomorphic flower and Zygomorphic flower (b) Differentiate between :-Apocarpous ovary and Syncarpous ovary (c) Differentiate between :-Racemose inflorescence and Cymose inflorescence

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Solution : (a) Actinomorphic Flower:-TWO equal halves are formed by any vertical division passing through the centre. (2) It has a radial symmetry.
Zygomorphic flower:-(1) Two equal havles are produced only by one vertical (2) It has a BILATERAL symmetry.
(b) Apocarpous OVARY:-(1) The flower has several free free carpels (ovary).(2) On maturity it forms fruitlet of aggregate type.
(1) The flower has fused carpels.(2) On maturity it forms a single fruit.
(c)Racemose inflorescence:-(1) The main axis has unlimited growth. (2) Flowers are arranged acropetally i.e., the lower flower are younger
Cymose inflorescence:-(1) The main axis has a LIMITED growth.(2) Flowers are arranged basipetally i.e., the lower flowers are OLDER
21337.

Question : Adipose tissue :

Answer»

Solution :Location : Below SKIN. FUNCTION : To MAINTAIN HEAT of the BODY
21338.

Question : Adipocytes are derived from

Answer»

FIBROBLASTS 
Monocytes 
WHARTON's JELLY 
WANDERING macrophages 

Answer :A
21339.

Question : Adiantum belongs to class

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Pteropsida
Psilopsida
Sphenopsida
LYCOPSIDA

ANSWER :A
21340.

Question : ADH increases______of the walls of collecting duct.

Answer»


ANSWER :PERMEABILITY
21341.

Question :ADH helps in water elimination, making the urine hypotonic. True/False

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ANSWER :FALSE
21342.

Question : ADH helps in water elimination, making the urine hypotonic.

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ANSWER :F
21343.

Question :ADH helps in water elimination, making the urine hypotonic.

Answer»


ANSWER :FALSE
21344.

Question : ADH can also be called as vasopressin.

Answer»


ANSWER :TRUE
21345.

Question : ADH : Diabetes inspidus :: Pancreatic beta-cells : ………….

Answer»

SOLUTION :DIABETES MELLITUS
21346.

Question : Adh

Answer»

increases water absorption
decreases water absorpiton
synthesis salt
controls sugar level of BLOOD.

Solution :Antidiuretic hormone (ADH) stimulataes readbsorption of water and ELECTROLYTES by the distal TUBULES and THEREBY reduces LOSS of water through urine.
21347.

Question : Addison's disesase is due to

Answer»

hyposcretion of ADRENAL cortex
hypersecretion of adrenal cortex
hyposcretion of adrenal MEDULLA
hypersecretion of adrenal medulla

21348.

Question : Adaptation of colour vision is found in …………………… .

Answer»

MAMMALS
AVES
REPTILES
All of these

SOLUTION :All of these
21349.

Question : Acturechest pain is a symptom of

Answer»

ANGINA
CAD
HEART FAILURE
Heart attack

Answer :A
21350.

Question : _____acts asa lubricant in a synovial joint.

Answer»


ANSWER :SYNOVIAL FLUID