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17451.

Question : Given below is the scientific name of Mango. Identify thecorrectly written name. (i) Mangifera Indica (ii) Mangifera indica.

Answer»

SOLUTION :MANGIFERA INDICA.
Discussion
17452.

Question : Given below is the scientific name of mango. Identify the correctly written name.

Answer»

MANGIFERA INDICA
Mangifera Indica

Solution :Mangifera Indica
Discussion
17453.

Question : Given below is the figure of a sarcomere. Identify the parts labelled as A to D and select the correct option.

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`{:("(A)",(B),(C),(D)),("(A-BAND)",(Z-"LINE"),(H-"zone"),(I-"band")):}`
`{:("(A)",(B),(C),(D)),("(A-band)",(H-"line"),(Z-"zone"),(I-"band")):}`
`{:("(A)",(B),(C),(D)),("(I-band)",(H-"line"),(Z-"zone"),(A-"band")):}`
`{:("(A)",(B),(C),(D)),("(I-band)",(Z-"line"),(H-"zone"),(A-"band")):}`

Solution :N//A
Discussion
17454.

Question : Given below is the diagrammatic representation os a standard ECG. Label its different peaks.

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SOLUTION :
Discussion
17455.

Question : Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown & one blank component " X" in it. Category Compound Cholesterol Guanine Amino acid NH_(2) Nucleotide Adenine Nucleoside Uracil

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SOLUTION :
Discussion
17456.

Question : Given below is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C.

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`{:(A,B,C),("PLACENTA","Glucagon","CALCITONIN"):}`
`{:(A,B,C),("OVARY","Glucagon","Growth hormone"):}`
`{:(A,B,C),("Placenta","INSULIN","Vasopressin"):}`
`{:(A,B,C),("Ovary","Insulin","Calcitonin"):}`

ANSWER :B
Discussion
17457.

Question : Given below is an imaginary pyramid of number.what could be one of the possibilities about certain organisms at some of the differennt levels

Answer»

LEVEL PC is "insects" and level SC is "SMALL insectivorous birds"
LevelPP is "phytoplanktons" in sea and "Whale" on TOP level TC
Level one PP is "pipal trees" and the level SC is "sheep"
Level PC is "RATS" and level SC is "cats"

Solution :N//A
Discussion
17458.

Question : Given below is a table comparing the effects of sympathetic and parasympathetic nervous system four four features. Which are feature is correctly described ? Feature, Sympathetic, Parasympathetic nervous system

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Salivary glands, stimulate SECRETION, inhibits secretion
PUPIL of the EYE, dilates, constricts
heart rate, DECREASES, increases
intestinalperistalsis, stimulates, inhibits

Solution :N//A
Discussion
17459.

Question : Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features (1-4) which one feature is correctly described? Feature sympathetic nervous system parasympathetic nervous system.

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SALIVARY GLAND- INHIBIT secretion-stimulate secretion
PUPIL of the eye-dilate-constricts eye
heart -rate decreases- increases
intestinal -STIMULATES -inhibits peristalsis

Solution :pupil of the eye-dilate-constricts eye
Discussion
17460.

Question : Given below is a schematic break up of the phases/stages of cell cycle which one of the following is the correct indication of the stage/phase in the cell cycle

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C-karyokinesis
D-synthetic phase
A-cytokinesis
B-metaphase

Answer :A
Discussion
17461.

Question : Given below is a diagram showing ATP synthesis during aerobic respiration, replace thesymbols A, B, C, D and E by appropriategerms given below , F_(1), particle, formation of Pi, 2H^(+), inner mitochondrialmembrane, ATP, Fo particle, ADP.

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Solution :A = ATP , B = `F_(1)` Particle, C = Formation of Pi D = `2H^(+)` , E = INNER MEMBRANE of mitochondria.
Discussion
17462.

Question : Given below is a diagram of a cell under compound microscope : Give one reason why you would call this cell, an animal or a plant cell.

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SOLUTION :CONTROLS all FUNCTIONS of the CELL
Discussion
17463.

Question : Given below are your statements (A-D) each with one or two balnks. Select the option which ocrrectly fills the blanks in any two statements. (A) Thymus secretes (i) which help in differentiating of ii (B) The adrenal medulla secretes i which stimulates the breakdown of ii to increased the blood glucose concentration during emergensy situations. (C) The Leydig's cells or i present in the intertubular spaces in testis, produce a group of hormones called ii (D) Thyroid gland secretes i and trliodothyronine which contain ii

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i melatonin, ii T-lymphocytes
i adrenaline, ii fat
i catecholamine, ii GLYCOGEN
i interstitial cells, ii LH
i catecholamine, ii glycogen
i THYROXINE, ii iodine
i PARATHYROID hormone, ii calcium
i THYMOSIN, ii B-lymphocytes

Answer :C
Discussion
17464.

Question : Given beloware types of cells present in some animals . Which of the following cells can differntiate to perform different functions ?

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choanocytes
INTERSTITIAL CELLS
Gastrodermal cells
Nematocysts

Answer :B
Discussion
17465.

Question : Given below are types of cells present in some animals. Which of the following cells can differentiate to perform different fucntions ? (A) Choanocytes (B) Interstitial cells (C) Gastrodermal cells (D) Nematocytes

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CHOANOCYTES 
INTERSTITIAL cells 
Gastrodermal cells 
NEMATOCYTES 

Answer :B
Discussion
17466.

Question : Given below are the plant diseases, name the deficient mineral responsible for the disease. (a) Khaira disease (b) Internal cork of apple (c ) Die back of Citrus (d) Sand drown of tobacco

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SOLUTION :
Discussion
17467.

Question : Given below are the general characters of a phylum .Identify the phulum . (i) Extracellular and intracellular digestion (ii) Tissue level of organization (iii) Indirect development (iv) No asexual reproduction

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CNIDARIA
PORIFERA
Ctenophora
Rotifera

Answer :C
Discussion
17468.

Question : Given below are some of the stages of the hydrarch A) Marsh meadow stage B)Reed swamp stage C) Submerged plant stage D) Phytoplankton stage E) Free floating plant stage Select the option that represents the correct sequence of these stages.

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D, C, E, B and A
C, E, A, B and D
B, D, C, A and E
D, E, C, B and A

Answer :A
Discussion
17469.

Question : Given below are three statements (A-C) each with one or two blanks. Select the option which correctly fills up the blanks in any two statements A)Disease or infections which are transmitted through sexual intercourse are collectively called (i) diseases B) Genetial herpes is (ii) disease C) Sterilization in males is (iii) while in females is (iv)

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(A)-(i) zygote, (ii) PURELINE:(B)-(i) oestrogen, (ii) poly
(A)-(i) embryo, (ii) HERD,(D)-(i) zygote, (ii) 4-6
1-(i) 6-8, (D)-(i) EGGS, (ii) 4-8
(B)-(i) FSH, (ii) SUPER, (C)-(i) 6-8

Answer :D
Discussion
17470.

Question : Given below are four types of epithelial tissues.(squamous, cuboidal, cilitated columnar). Find out the tissue that are present in the following Walls of alveoli

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SOLUTION :SQUAMOUS
Discussion
17471.

Question : Given beloware listof commercial productsobtainedfrom plants. Mentionthe partsof plant whichis used to obtainedthem. (a)Rubber(b) Cinnamon(c ) Turpentine

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SOLUTION :
Discussion
17472.

Question : Given below are four types of epithelial tissues.(squamous, cuboidal, cilitated columnar). Find out the tissue that are present in the following Inner lining of falloplan tube

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SOLUTION :CILIATED
Discussion
17473.

Question : Given below are four matchings of a animal and its kind of respiratory organ (A) Silver fish - Trachea(B) Scorpion Book lung (C) Sea squirt - Pharyngeal gills(D) Dolphin Skin The correct matchings are

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A ANDB
A,B and C
B ANDD
C and D

SOLUTION :A,B and C
Discussion
17474.

Question : Given below are different types of epithelial tissue . Find out the tissue that a present on trachea. (squamous, cuboidal, ciliated, columnar)

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SOLUTION :Ciltiated
Discussion
17475.

Question : Given below are a few statements related to external fertilization (I) The male and female gametes are formed and released simultaneously. (II) Only a few gametes are released into the medium (III) Water is the medium in a majority of organisms exhibiting external fertilization (IV) Offspring formed as a result of external fertilization have better chances of survival than those formed inside an organism.

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III and IV
I and III
II and IV
I and IV

Answer :B
Discussion
17476.

Question : Given below are a few floral formulae of some well known plants . Draw floral diagram from these formulae. (i) o+ K_((5)) C_((5)) A_(5)G_((underline2)) (ii) K_((5)) C_(1 + 2 + 2) A_((9) + 1) "" G_(underline1) (iii) o+ K_(5)C_(5) "" A_(5 + 5 G_((5))

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SOLUTION :(i) Floral Formula `o+ "" K_((5)) C_((5)) A_(5) G_(underline 2)` represents flowers of Solanaceae family.

(ii) Floral Formula `% "" K_((5)) C_(1 +2 + 2) A_((9) + 1) G_(1)` represents flowers of Fabaceae family.

(III)
Discussion
17477.

Question : Given below are a few floral formulae of some well known plants. Draw floral diagrams form these formulae. (i) o+K_((5))C_((5))A_((5))G_((2)) (ii) %K_((5))C_(1+2+2)A_((9)+1)G_(1) (iii) o+K_(5)C_(5)A_(5+5)G_((5))

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SOLUTION :(i) Floral formula : `o+K_((5))C_((5))A_(5)G_((2))` indicates SOLANACEAE family

(ii) Floral formula : `%K_((5))C_(1+2+2)A_((9)+1)G_(1)` indicates Fabaceae family
(III) Floral formula : `o+K_(5)C_(5)A_(5+5)G_(5)` indicates malvaceae family
` (##KPK_AIO_BIO_XI_C05_E05_025_S03.png" width="80%">
Discussion
17478.

Question : Describe species-area relationship on log scale.

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SOLUTION :log S= `logC+ Z log A`
Where S = Species richness
Z = SLOPE of the LINE (regression coefficient)
C = Y - intercept.
Discussion
17479.

Question : Given an accountof Xanthophylls .

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Solution :Yellow `(C_(40)H_(50)O_(2))`pigment are likecarotenes but contain OXYGEN. Luteinis responisibleforyellowcolour changeof leavesduringseason.Examples : Lutein , Violaxanthin and Fucoxnathin.
Discussion
17480.

Question : Give an account of G_0 phase.

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Solution :Some cells exit `G_(1)` and ENTERS a quiescent stage called `G_(0)`, where the cells remain metabolically active WITHOUT proliferation. Cells and exist for long periods in `G_(0)` phase. In `G_(0)` cells cease GROWTH with reduced rate of RNA and PROTEIN synthesis. The `G_(0)` Phase is not permanent. Mature neuron and skeletal muscle cell remain permanently in `G_(0)`. many cells in animal remains in `G_(0)` UNLESS called onto proliferate by appropriate growth factors or other extracellular signals. `G_(0)` cells are not dormant.
Discussion
17481.

Question : Givenan account of Chlorophyll.

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Solution :Chlorophyll 'a'is theprimarypigmentwhich acts as a reactioncentreand allotherpigments actas accessorypigments and trap solar ENERGYAND thentransfer it to chlorophyll 'a'. Chlorophyllmolecules have a tadpole likestructure . Itconsists of four pyrrolerings linkedtogether byC- H bridges . Each pyrroleringcomprise of fourcarbonsand onenitrogenatom . Porphyrin ring has several side groups which alterthe propertiesof thepigment . Differentsidegroupsareindicative of VARIOUS typesof chlorophyll . The Phytol TAIL madeup of 20 carbonalcohol is attached to carbon 7 of the Pyrrole ring IV.It hasalongpropionicacid esterbond. LONG lipophilic tail helps in anchoringchlorophyll to thelamellae .
Discussion
17482.

Question : Given a brief account on fungal food.

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Solution :Mushrooms like Lentinus edodes, Agaricus bisporus and Volvariella volvaceae are consumed for their high NUTRITIVE value. Yeasts PROVIDE VITAMIN B and Eremothecium ashbyii is a rich source of vitamin `B_(12)`.
Discussion
17483.

Question : Give types of teeth and describe the arrangement of teeth in mouth with diagram.

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Solution :Thecodont: Each tooth is embedded in a socket of jaw BONE. This type of attachment is called thecodont.
Diphyodont : At the age of 6 years a set of temporary milk teeth or deciduous teeth are replaced by a set of permanent or adult teeth. This type of dentition is called diphyodont.
Types of Teeth : Majority of Mammals including human beings forms two sets of teeth during their life.
(i) Deciduous or milky teeth (ii) Permanent or Adult teeth.
The number of milk teeth is 20. The DENTAL formula of a child is `(2 1 0 2)/(2 1 0 2)`
An adult human has 32 permanent teeth which are of four different types. There are 16 teeth in each jaw. If we see its order, In the middle (Incisors-I), One canine (Canine-C), two premolars (PREMOLAR - PM) and three molars (Molar-M),
Arrangement of teeth in each HALF of the upper and lower jaw in the order I, C, PM,Mis represented by a dental formula which in human is `(2 1 2 3)/(2 1 2 3)`.
The hard chewing SURFACE of the teeth is made up of enamel.
Discussion
17484.

Question : Give various causes for seed dormancy.

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Solution :Various Causes for Seed Dormancy :
UNDERDEVELOPED embryo.
Seed coats IMPERMEABLE to water.
MECHANICALLY hard and strong seed coats which do not permit germination.
Physiologically immature embryo.
Presence of some germination-inhibiting chemicals. Amongst them the main one is Abscisic acid.
Amongst hormones, Gibberrelins are absent in dormant seeds.
At this time, ABA remains ACTIVE. It INHIBITS the transcription of genes. As a result, proper enzymes are not synthesized.
Removal of Seed Dormancy
Discussion
17485.

Question : Give two identifying features of an adult male frog.

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Solution :There are two FEATURES for identification in ADULT male frog : (a) Vocal sacs : Male FROGS can be distinguished by presence of sound producing vocal sacs located in throat region and a folded structure. (b) Copulatory pad : A copulatory pad is found in male frogs on the first digit of the forelimb which HELPS it in COPULATION for holding female.
Discussion
17486.

Question : Give two factor that determine cell isze.

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Solution :NUTRIENT and OXYGEN requirement, regulating ABILITY of nucleus.
Discussion
17487.

Question : Give two examples of roots that develop from different parts of the angiospermic plant other than the radicle.

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SOLUTION :(i) In banyan tree, prop roots are produced from nodes located below stem and develop downwards and TOUCH the soil. Prop roots WORK for support.

(ii) In sugarcane, stilt roots are produced from the nodes of lower side of stem and enter into the soil and provide strength to plants and also give protection to PLANT against the wind.
Discussion
17488.

Question : Give two examples of photosynthetic microorganisms, Which also fix atmospheric nitrogen.

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SOLUTION :ANABAENA, NOSTOC
Discussion
17489.

Question : Give two examples of photosynthetic micro-organisms which also fix atmospheric nitrogen.

Answer»

SOLUTION :NOSTOC (CYANOBACTERIUM), Thiospirillum (BACTERIUM).
Discussion
17490.

Question : Give two examples of long-day plants that flower during summer.

Answer»


ANSWER :WHEAT, SPINACH
Discussion
17491.

Question : Give two examples for each of the following Muscular proteins

Answer»

SOLUTION :MUSCULAR PROTEINS - ACTIN/Myosin/Troponin/Tropomyosin/F actin/G actin.
Discussion
17492.

Question : Give two examples for each of the following Synovial joins

Answer»

SOLUTION :SYNOVIAL JOINS - BALL and socket/Hinge/saddle/pivot/gliding JOINTS.
Discussion
17493.

Question : Give two examples for angiospermic plants producing adventitious roots.

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SOLUTION :(a) Buttress root of Bombax. (b) Prop (PILLAR) root of FICUS benghalensis.
Discussion
17494.

Question :Give two example of each type of phyllotaxy.

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SOLUTION :TYPE of phyllotaxyExamples (i) Alternate :-CHINA rose, mustard (II) Opposite:- Calotropis, guava (iii) Whorled:- Nerium, Alstonia
Discussion
17495.

Question : Give two evidences to support that flower is a modified shoot.

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Solution :1. The position of FLOWER BUDS and shoot buds is the same. They are terminal or axillary in position.
2. In some plants, the flower buds are modified into vegetative buds or bulbils. EG: ONION.
Discussion
17496.

Question : Give two alternative names for cell membrane.

Answer»

SOLUTION :PLASMA MEMBRANE, PLASMALEMMA.
Discussion
17497.

Question : Give three major differences between chordates and non - chordates and draw a schematic sketch ofa chordate showing those feature.

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SOLUTION :
Discussion
17498.

Question : Give three examples of false ,fruits.

Answer»

SOLUTION :APPLE, PINEAPPLE, JACK FRUIT.
Discussion
17499.

Question : Give the type and functions of root system on the basls of its origin.

Answer»

Solution :In majority of the dicotyledonous plants, the direct elongation of the radicle leads to the formation of primary root that grows inside the soil.
It bears lateral roots of several ORDERS that are referred to as secondary, tertiary, etc. roots.
Tap Root System : The primary roots and its branches constitute the tap root system. e.g mustard plant.

Fibrous Root System : In MONOCOTYLEDONOUS plants, the primary root is short lived and is REPLACED by a large number of roots.
These roots originate from the base of the stem and constitute the fibrous root system, as seen in the wheat plant.

In some plant, like grass, monstera and the banyan tree, roots arise from PARTS of the plant other that the radicle and are called adventitious roots.

Functions : The main functions of the root sytem are shown below :
(i) Absorption of water and minerals from the soil.
(ii) Providing a proper anchorage to the plant parts.
(iii) STORING reserve food materal.
(iv) synthesis of plant growth regulators.
Discussion
17500.

Question : Give the three essential characteristics of the cells.

Answer»

SOLUTION :CELL membrane, CYTOPLASM and NUCLEAR material.
Discussion