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8301.

Question : What do you understand by naked DNA ?

Answer»

Solution :DNA in which ASSOCIATED HISTONES are ABSENT and not surrounded by nuclear envelope.
Discussion
8302.

Question : What do you understand by isochronic movement of cilia?

Answer»

SOLUTION : In this CASE, all CILIA BEAT SIMULTANEOUSLY.
Discussion
8303.

Question : State the law of independent assortment.

Answer»

SOLUTION :The random distribution of HOMOLOGOUS CHROMOSOMES in a cell in METAPHASE I is called independent ASSORTMENT.
Discussion
8304.

Question : What do you understand by holocarpic and eucarpic fungi?

Answer»

Solution :Holocarpic fungi : In this vegetative STRUCTURE is TRANSFORMED into reproductive structure.
Eucarpic fungi : In this CASE, reproductive phase is distinct from vegetative phase.
Discussion
8305.

Question : What do you mean by Zwitter ionic nature of amino acids?

Answer»

SOLUTION :AMINO acid having +vecharge on`-NH_(2)` GROUP and-vecharge on-carboxyl GROUPIE, doubly CHARGED ion
Discussion
8306.

Question : What do you mean by the term 'Embolism' ?

Answer»

Solution :GAS bubbles EXPANDING and displacingwater WITHIN the xylem element is CALLED CAVITATION or embolism.
Discussion
8307.

Question : What do you mean by the term – Basipetal transport and Acropetal transport?

Answer»

Solution :Basipetal MEANS TRANSPORT through phloem from SHOOT to ROOT and acropetal means transport through xylem from root to shoot.
Discussion
8308.

Question : Whatdo you mean by theterm"Autumn Wood"?

Answer»

SOLUTION :In WINTER, the CAMBIUM is LESS activeand formsfewerxylaryelementsthat have narrowvessels/tracheidsandthiswoodis calledautumnwoodor late WOOD .
Discussion
8309.

Question : What do you mean by taxonomical aids?

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SOLUTION :Tools, techniques, procedures and stored information that are useful in IDENTIFICATION and classification of ORGANISMS are CALLED taxonomical aids.
Discussion
8310.

Question : What do you mean by retting of fibres?

Answer»

Solution :The FIBRES from the fibre YIELDING PLANTS are separated by the action of Clostridium is CALLED retting of fibres.
Discussion
8311.

Question : What do you mean by Respiratory substrate ? Give example.

Answer»

Solution :Respiration is a biological process in which OXIDATION of various FOOD substance. LIKE carbohydrates, proteins and fats take PLACE and a result of this, energy is produced where`O_2` is taken in and `CO_2` is LIBERATED. The organic substances which are oxidised during respiration are called resiratory substrtes.
Discussion
8312.

Question : What are respiratory substrates? Name the most common respiratory substrate.

Answer»

Solution :RESPIRATION is a biological process in which oxidation of various food SUBSTANCES like carbohydrates, PROTEINS and fats take place and as a result of this, ENERGY is produced where `O_2` is taken and `CO_2` is liberated. The organic substances which are oxidised during respiration are CALLED respiratory substrates.
Discussion
8313.

Question : What do you mean by Phloem loading ?

Answer»

SOLUTION :The MOVEMENT o photosynthates( products of photosynthesis ) from mesophyll cells to phloem sieve elements of MATURE leaves is KNOWN as phloem loading.
Discussion
8314.

Question : What do you mean by metameric segmentation? Give one example.

Answer»

SOLUTION :When external DIVISION of body annuli and division of coelom by SEPTA correspond each other e.g., in annelids LIKE earthworm
Discussion
8315.

Question : Whatdo you mean by loadingof oxygen in blood?

Answer»

SOLUTION :Binding of OXYGEN with Hb of RBCS is CALLED loadingof `O_(2)` or oxygenation of Hb.
Discussion
8316.

Question : What do you mean by Hydathode ?

Answer»

SOLUTION :A hydathode is a type of epidermal pore, commonly found plants. STRUCTURALLY, hydathodes are modified stomata, usually located at LEAF TIPS or margins, expecially at the teeth.
Discussion
8317.

Question : What do you mean by Kranz anatomy? Give two examples.

Answer»

Solution :When chloroplasts in CELLS of bundle sheath LACK grana and mesophyll chloroplasts are NORMAL as in `C_3` plants, it is called Kranz anatomy. Examples are SUGARCANE and Sorghum.
Discussion
8318.

Question : What do you mean by holoenzymes?

Answer»

SOLUTION :A holoenzyme is a CONJUGATED ENZYME and is formed of a proteinous part CALLED apoenzyme and a non-proteinous part called cofactor.
Discussion
8319.

Question : What do you mean by G_(0) stage?

Answer»

SOLUTION :`G_(0)` stage is called as quiescent stage, where the CELLS remain metabolically active WITHOUT PROLIFERATION.
Discussion
8320.

Question : What do you mean by closed vascular bundles

Answer»

Cambium PRESENT
Cambium absent
PERIDERM absent
NONE of these

Answer :B
Discussion
8321.

Question : What do you mean by caudex ?

Answer»

SOLUTION :If the trunk of a plant remains unbranched it is said to be CAUDEX, eg, Palmyra and COCONUT.
Discussion
8322.

Question : What do you mean by 'ghost' in lytic cycle of phage?

Answer»

SOLUTION :The empty protein coat left OUTSIDE by the PHAGE after penetrating the host cell is CALLED ghost.
Discussion
8323.

Question : What do you know about Dr. E.K. Janaki Ammal?

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Solution :1. She was the first officer on SPECIAL duty who took charge of BOTANICAL survey of India with , headquarters of at Calcutta.
2. JAMMU Tavi Botanical Garden has been named , after Dr. E. K. JANAKI Ammal.
Discussion
8324.

Question : What do you infer from the term pycnoxylic?

Answer»

SOLUTION :Pyenoxylic wood is COMPACT with narrow MEDULLARY ray. EXAMPLE: PINUS
Discussion
8325.

Question : What do you infer from the term pycnoxylic ?

Answer»

SOLUTION :It refers to a TYPE of wood in Gymnosperms which is COMPACT with NARROW medullary ray.
Eg.: Pinus.
Discussion
8326.

Question : What do you call the sheath covering the plumule ?

Answer»

SOLUTION :COLEOPTILE
Discussion
8327.

Question : What do you call a fruit which develops from an entire spike inflorescence ? Give an example.

Answer»

SOLUTION :SOROSIS, MULBERRY
Discussion
8328.

Question : What do we learn from identification of individuals and populations?

Answer»

Solution :Iedentified individuals show morphological and behavioural VARIATIONS which are RANDOMLY DISTRIBUTED in species POPULATIONS through sexual REPRODUCTION and enviromental interactions.
Discussion
8329.

Question : What do we learn from identification of individuals?

Answer»

SOLUTION :Identification GIVES the characteristics of the organisms. On the BASIS of this a SCIENTIFIC name by mearis of binomical NOMENCLATURE is given to it.
Discussion
8330.

Question : What do we learn from identification of individuals and populations ?

Answer»

Solution :Indentification of individuals and POPULATION CATEGORISED it into a species. Each species has unique CHARACTERISTICS features. On the BASIS of these features, it can be distinguished from other closely RELATED species.
Discussion
8331.

Question : What do they teach us ?

Answer»

Solution :The ORGANISMS found in nature, which create astromishment are :
The beauty of galloping horse Migrating birds
The valley of flowers
The attacking shark ETC.
Evokes awe are and a deep sense of wonder.
They TEACH us about the ecological conflict and cooperation among members of a population and among populations of a community
They ALSO give information about the molecular traffic inside a cell.
Discussion
8332.

Question : What do we call the type of teeth attachment to jaw bones in which each tooth is embedded in a socket of jaws bones ?

Answer»

Solution :Each TOOTH is embedded in a SOCKET of jaw BONE. This TYPE of attachment is called THECODONT.
Discussion
8333.

Question : What do we call the vertebrate group which possesses dry scaly skins ?

Answer»

SOLUTION :REPTILIA
Discussion
8334.

Question : What do the two terms indicate?

Answer»

SOLUTION :GENUS and SPECIES.
Discussion
8335.

Question : What do the terms Psi_(s)andPsi_(p) denotes?

Answer»

<P>

SOLUTION :`Psi_(s),Psi_(p)` DENOTE the EFFECTS of solute and pressure
Discussion
8336.

Question : What do the terms phycobiont and mycobiont signify?

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Solution :The PHYCOBIONT REFERS the ALGAL PARTNER whereasthe mycobiont fungal partner in a LICHEN.
Discussion
8337.

Question : What do the terms phycobiont and mycobiont signify ?

Answer»

Solution :Phycobiont refers to the algal component of the lichens and mycobiont refers to the fungal component.
Algae CONTAIN CHLOROPHYLL and prepare FOOD for fungi whereas the fungus PROVIDES shelter to algae and absorbs water and nutrients from the soil.
This type of relationship is REFERRED to as symbiotic.
Discussion
8338.

Question : What do pyrenoids contain?

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SOLUTION :They CONTAIN PROTEIN and STARCH.
Discussion
8339.

Question : What do mast cells secrete ?

Answer»

SOLUTION :HEPARIN.
Discussion
8340.

Question : What do Juxta glomerular cells secrete that regulate the blood flowing through glomerulus?

Answer»

Solution :These CELLS secrete ENZYME like RENIN that modulates blood pressure and regulates the blood flowing through glomerulus.
Discussion
8341.

Question : Whatdo heart woodand sapwood stand for ?

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SOLUTION :HEART woodrefersto thedarkcentralpart of WOOD .
SAP woodrefersto the PALE peripheralpart of wood.
Discussion
8342.

Question : What do hardwood and softwood stand for?

Answer»

SOLUTION :The DIFFERENCE between SOFTWOOD and HARDWOOD is as FOLLOW :
Discussion
8343.

Question : What do grey and white matter in the brain represent?

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Solution :Grey matter is main PART in CENTRAL nervous system. It has neurons of nerve cells, dendrites, medullated AXON, glial cells and BLOOD capillaries are present. White matter has glial cells and AXONS of non-myelinated nerve cells are present.
Discussion
8344.

Question : Whatdo hard wood and soft wood stand for?

Answer»

Solution :SOFT wood is MAINLY MADE up of trancheids and is present in GYMNOSPERMS. Hard wood is made up of both vessels and TRACHEIDS and present in angiosperms.
Discussion
8345.

Question : What do DNA and RNA stand for ?

Answer»

SOLUTION :DEOXYRIBONUCLEIC ACID, RIBONUCLEIC acid.
Discussion
8346.

Question : What distinguishes an insect from crustacean?

Answer»

number of EYES
ARRANGEMENT of nerve cords
number of appendages
PRESENCE of WNGS.

Solution :number of appendages
Discussion
8347.

Question : What different criteria would you choose to classify people thatyou meet often?

Answer»

SOLUTION :The VARIOUS criteria that maybe chosen to classify people include: Morphotaxonomy, Numerical TAXONOMY, Behaviour and GEOGRAPHICAL DISTRIBUTION.
Discussion
8348.

Question : What different criteria would you choose to classify people that you meet often?

Answer»

Solution :We can recognise and CLASSIFY the people we OFTEN meet on the basis of their, (a) morphology (b) behaviour (c) sex (d) height (E) weight (f) GEOGRAPHICAL DISTRIBUTION.
Discussion
8349.

Question : What did Nicolson and Singer propose?

Answer»

SOLUTION :Fluid-mosaic MODEL of UNIT MEMBRANE.
Discussion
8350.

Question : What could be the result if the biomembranes were permeable ?

Answer»

SOLUTION :Any MATERIAL around the CELLS COULD enter them and the cells could not remain UNITS distinct from their environment.
Discussion