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8051.

Question : What is constipation?

Answer»

SOLUTION :In this condition, the faces are retained within the recture because of irregular bowel movement due to poor intake of FIBRE in the DIET and lack of PHYSICAL ACTIVITIES.
Discussion
8052.

Question : What is compound epithelium ? What are their main function ?

Answer»

SOLUTION :STRATIFIED EPITHELIUM
Discussion
8053.

Question : What is consequence of efflux of K^(+) ions?

Answer»

Solution :The efflux of `K^(+)` ions LEADS to osmotic LOSS of water from guard cells and results in closure of stomata.
Discussion
8054.

Question : What do you mean by 'consciousness'?

Answer»

Solution :ANIMALS sence their surroundings by SENSE ORGANS. This is called consciouness. Respond of plants to the STIMULI is called irritability.
Discussion
8055.

Question : What is common to Nepenthes, Utricularia and Drosera with regard to mode of nutrition?

Answer»

Solution :All the THREE CARNIVORES (insectivorous) plants depend UPON CAPTURED INSECTS for their nitrogen requirement.
Discussion
8056.

Question : What is common to Lantana, Eichhornia and African catfish?

Answer»

All are endangered species of India
All are KEY STONE species
All are MAMMALS found in India
All the species are NEITHER threatened nor indigenous species of India

Answer :D
Discussion
8057.

Question : What is common to both the species shown in figures A and B ?

Answer»

Both are INVASIVE WEED species
Both are ENDANGERED plants
Both are medicinal plants
Both are EXTINCT plants

Answer :A
Discussion
8058.

Question : What is common in lion, leopard and tiger ? (A) All belong to same species (B) All belong to same genus Felidae (C) All belongs to same genus panthera (D) None of these

Answer»

All BELONG to same species
All belong to same GENUS Felidae
All BELONGS to same genus panthera
None of these 

ANSWER :C
Discussion
8059.

Question : What is common in lion and cats ?

Answer»

Both BELONG to same GENUS FELIDAE
Both belong to same genus panthera
Both belong to same species
Both belong to same FAMILY Felidae 

ANSWER :D
Discussion
8060.

Question : What is common in all the three, Funaria, Dryopteris and Ginkgo ?

Answer»

PRESENCE of archegonia
Well developed VASCULAR tissues
Independent gametophyte
Independent sporophyte

Solution :Presence of archegonia is common in all the three, Funria (bryophyte), DRYOPTERIS (pteridophyte) and Ginkgo (GYMNOSPERM).
Discussion
8061.

Question : What is common between vegetative reproduction and apomixis?

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Both are applicable to only dicot plants
Both bypass the FLOWERING phase
Both OCCUR ROUND the year
Both produce PROGENY IDENTICAL to the parent

Answer :D
Discussion
8062.

Question : What iscommon between peacock ,kangaroo and cobra ?

Answer»

TWO PAIRS of LIMBS
AMNION
4-Chambered heart
Homeothermy

Answer :B
Discussion
8063.

Question : What is common between parrot, platypus and kangaroo?

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toothless jaws
FUNCTIONAL postanal TAIL
OVIPARITY
HOMEOTHERMY

Answer :D
Discussion
8064.

Question : What is common between chloroplasts,chromoplasts and leucoplasts?

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PRESENCE of pigments
Prossession of THYLAKOIDS and grana
Storage of STARCH,PROTEINS and lipids
Ability to MULTIPLY by a fission-like process

Answer :D
Discussion
8065.

Question : What is common between earthworm and periplaneta ?

Answer»

Both have red COLOURED BLOOD
Both posses anal styles
Both have MALPIGHIAN tubules
Both have segmented BODY

Answer :D
Discussion
8066.

Question : What is common between an earthworm, a cockroach and a centipede

Answer»

Sexual dimorphism
Metamorphism
Chitnous exoskeleton
Haemocoel

Solution :Egg of OSTRICH WEIGHTS nearly 1.5 kg and requires about 50 minutes to BOIL it it is the largest egg AMONG the ANIMALS
Discussion
8067.

Question : What is common between a fern leaf and a Cycas leaf.

Answer»

SOLUTION :CIRCINATE PTYXIS.
Discussion
8068.

Question : Which one of the following features is common in silver fish , scorpion , dragonfly and prawn ?

Answer»

JOINTED LEGS
METAMORPHOSIS
COMPOUND EYES
tracheae

Answer :A
Discussion
8069.

Question : What is common about Trypanosoma, Noctiluca, Monocystis and Giardia ?(a) these are all parasites(b) these are all unicellular protists(c) they have flagella(d) they produce spores

Answer»

these are all parasites
these are all UNICELLULAR protists
they have flagella
they PRODUCE SPORES
Discussion
8070.

Question : What is common among amylase, renin and trypsin ?

Answer»

All PROTEINS
Proteolytic enzymes
PRODUCED in stomach
ACT at PH lower than 7

Solution :N/A
Discussion
8071.

Question : What is comb foundation?

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SOLUTION :COMB FOUNDATION is a sheet of bee wax, on both SIDES of which the exact shape of different cells of the comb is made in advance.
Discussion
8072.

Question : What is cohort?

Answer»

Solution :COHORT or ORDER represents the UNIT of classification higher than FAMILY, which includes a group of closely RELATED families.
Discussion
8073.

Question : What is coenanthium? Give examples.

Answer»

SOLUTION :It is a special inflorescence. A circular disc like fleshy open receptacle bears pistillate flowers at the CENTRE and STAMINATE flowers at the periphery. Eg: Dorstenia.
Discussion
8074.

Question : What is coelom ? Describe its types.

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Solution :The body cavity, (between the body wall and GUT wall) which is lined by mesoderm is called coelom.
The presence or absence of coelom is very important in classification
On the basis of coelom animals can be classified in THREE different GROUPS.

Acoelomate : The animals in which the body cavity is absent are called ACOELOMATES.
e.g. Poriferan, platyhelminths, coelenterates ctenophores and flatworms.
Pseudocoelomate :
In some animals, the body cavity is not lined by mesoderm.
Instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm.
Such a body cavity is called PSEUDOCOELOM and the animals possessing them are called pseudocoelomates, Aschelminthes.
Coelomate :
The animals having truc coclom are called coelomates.
Annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.
Discussion
8075.

Question : What is coelenteron?

Answer»

SOLUTION :The central VISCERAL CAVITY of CNIDARIANS is called COELENTERON.
Discussion
8076.

Question : What is CO_(2) fixation ? Where does it occur ?

Answer»

SOLUTION :Converison of `CO_(2)` into CARBOHYDRATES in the CHLOROPLASTS.
Discussion
8077.

Question : What is CO_2 compensation point?

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SOLUTION :Whenthe RATEOF photosythesisequalsthe rateof respiration ,there isno exchangeof oxygenand CARBON DIOXIDE, and thisis calledas carbon dioxide compensationpoint .
Discussion
8078.

Question : What is Co-extinction?

Answer»

SOLUTION :Co-extinction of a species is the LOSS of a species as a CONSEQUENCE of the extinctionof another. (Eg. ORCHID bees and forest TREES by cross pollinations).
Discussion
8079.

Question : What is cladode?

Answer»

Solution :PHYLLOCLADE with ONE node is called CLADODE.
Discussion
8080.

Question : What is classification and what is its advantages ?

Answer»

Solution :If is almost impossible to study all the living ORGANISMS.
So it is necessary to devise some means to make this possible.
This can be done by CLASSIFYING the organisms.
Thus classification is the process by which organisms are grouped into convenient categories based on some easily observable characters.
Biological classification is the scientific arrangement, of organisms in a HIERARCHY of groups and sub groups on the basis of similarities and differences in their traits.
Advantages of classification :
(a) It helps to identify an organism easily.
(b) New organisms easily get correct place in their respective groups.
(c) It MAKES study of fossils easy.
(d) It also helps in building evolutionary pathways.
(e) It becomes easy to know the features of whole group by STUDYING one or two organisms of the group.
Discussion
8081.

Question : Write short notes on cladistic analysis.

Answer»

Solution :Cladistic classification is the method of classifying the organisms BASED on GENETIC differences among all species in a PHYLOGENETIC TREE.
Discussion
8082.

Question : What is choroid plexus?

Answer»

Solution :CHOROID plexus is a NETWORK of BLOOD capillaries found in the roof of the ventricies. This FORMS cerebro SPINAL fluid from the blood.
Discussion
8083.

Question : What is chondrin? Where is it present?

Answer»

SOLUTION :Chondrin is a PROTEIN , it is PRESENT in CARTILAGE.
Discussion
8084.

Question : What is cholecystokinin?

Answer»

BILE PIGMENT
Gastro-intestinal HORMONE
ENZYME
Lipid

Solution :N/A
Discussion
8085.

Question : What is chlorosis?

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SOLUTION :Yellowing of leaves DUE to LOW chlorophyll contents
Discussion
8086.

Question : What is chemical nature of ribosomes?

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Solution :Ribosomes are FORMED of r-RNA and proteins so are called RNP PARTICLES.
Discussion
8087.

Question : What is chemical nature of middle lamella?

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SOLUTION : FORMED of CALCIUM pectates
Discussion
8088.

Question : What is characteristic of gymnosperms

Answer»

Triploid endosperm
Absence of ANNUAL habit
Occurrence of minute FLOWERS
Absence of strobili

ANSWER :B
Discussion
8089.

Question : What is centromere? Describe types of chromosomes on the basis of position of centromere.

Answer»

Solution :Centromere, also called primary constriction, is a lightly coloured constricted area at which TWO sister chromatids of a chromosome are JOINED. On the basis of position of centromere, the chromosomes are of four TYPES:
(i) Telocentric when centromere is terminal in position. (ii) Acrocentric when centromere is subterminal in position. (III) Submetacentric when centromere is NEAR the centre. (iv) Metacentric when centromere is at the centre of chromosome.
Discussion
8090.

Question : What is cerebral aqueduct or aqueduct of Sylvius?

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Solution :The ventricle III is continuous with the ventricle IV in the HIND brain through a CANAL called aqueduct of SYLVIUS or CEREBRAL aqueduct.
Discussion
8091.

Question : What is Cauda equina ?

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Solution :The THICK bundle of elongated nerve roots WITHIN the lower VERTEBRAL canal is called the cauda EQUINA.
Discussion
8092.

Question : What is caruncle? Where it is seen? How it helps the plant?

Answer»

Solution :CARUNCLE is the fleshy OUTGROWTH at the base of seed. Usually caruncle helps in the seed DISPERSAL, particularly by ANTS (Myrmecophily).
Discussion
8093.

Question : What is cardiac output ?

Answer»

SOLUTION :It refers to VOLUME of blood pumped out by each ventricle per MINUTE. It is equal to 5 litre in a healthy HEART.
Discussion
8094.

Question : What is Canal system?

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Solution :The water transport system in SPONGES through which water enters through minute pores and goes out through the large OPENING called OSCULUM. It HELPS is nutrition, circulation, respiration and EXCRETION.
Discussion
8095.

Question : What is canal of schlemm?

Answer»

Solution :At the junction of the sclera and the cornea, there is a CHANNEL CALLED 'canal of schlemm'. It CONTINUOUSLY DRAINS out the excess of AQUEOUS humour.
Discussion
8096.

Question : What is Canada Balsam ?

Answer»

Solution :Canada balsam is a RESIN obtained from Abies balsamea. It is used as MOUNTING medium in PERMANENT slide PREPARATION.
Discussion
8097.

Question :What is called venation ? Describe its types.

Answer»

Solution : VENATION: The arrangement of veins and the VEINLETS in the famina of leaf is termed as venation.
When the veinlets form network, the venation is termed as reticulate. When the veins run parallel to each other within a lamina, the venation is termed as parallel.
LEAVES of dicotyledonous plants generally possess reticulate venation, while parallel venation is the characteristic of most monocotyledons.

More information :
The sub types of venation reticulate and parallel are unicostate and Multicostate.
Multicostate venation is either of convergent or divergent type.
Vascular tissues are located in veins.
Veins of venation transport WATER, soluble salts and prepared food.
Venation forms structure of leaf lamina.
Discussion
8098.

Question : What is called quiescent stage? Give information.

Answer»

Solution :Some cells in the adult animals do not appear to exhibit division (e.g., heart cells, nerve cells) and many other cells divide only occasionally as needed, to replace cells that have been lost because of injury or cell death.
These cells that do not divide further exit `G_1`PHASE to enter an inactive stage called quiescent stage `(G_0)`of the cell cycle.
Cells in this stage remain metabolically active but no longer proliferate UNLESS called on to do so depending on the requirement of the organism.
Note : In animals, MITOTIC cell division is only seen in the diploid somatic cells. The plants can SHOW mitotic divisions in both HAPLOID (n) and (2n) diploid cells.
Discussion
8099.

Question : What is called double circulation ? Explain the pathway of double of double circulation with diagram.

Answer»

SOLUTION :Human circulatory system is made up of NETWORK of heart, verious types of duats, arteries, veins and capillaries.
In human circulation, the circulation of oxygenated and deoxygenated blood is cerrried out separately. Therefore it is called double circulation.
The blood pumped byb the right ventricle enters the pulmonary artery is pulmonary artery, whereas the LEFT ventricle pumps the blood into the aorta.
the deoxygenated blood pumped into the pulmonary artery is passed on the lungs from where the oxygenated blood is cerried by the pulmonary veins into the left atrium.
this pathways constitutes the pilmonary circulation.
This oxygenated blood ENTERING the aorta is carried by a network of arteries, arterioles and capillaries to the tissue from wgere the deoxygenated blood is collected by a system of venukles, veins and vena cava and emptied into the right atrium.
This is the systemic circulation.
The ststemic circulation PROVIDES nutrients, `O_(3)` and other essential substances to the tissue and takes `CO_(2)` and other harmful substances away for elimination.
A unique vascular connection exits betwwen between the digestive tract and liver called hepatic portal system. the hepatic portal vein carries blood from intestine to the liver before it is delivered to the systemic circulation.
A special coronary system of blood vessels is present in our body exclusively for the circulation of blood to and from the cardiac musculature.
Discussion
8100.

Question : What is called Aestivation ? Describe its types.

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.
Its types are as follow:
(i) Valvate : When sepals or petals in a whorl just touch one another at the margin , WITHOUT overlapping, is said to be valvate for e.g. Calotropis.
(ii) Twisted : If one margin of the appendage overlaps that of the next one and so on it is CALLED twisted. e.g. China rose, Lady.s finger, Cotton.
(iii) IMBRICATE : If the margins of sepals or petals overlap one another but not in any other direction the aestivation is called imbricate for eg. Cassia and Gulmohur. (iv) Vexillary or Papilionaceous : In PEA and bean flowers, there are five petals, the largest (standard) overlaps the twr lateral petals (wings) which in turn overlap the two smallest anterior petals this type of aestivation is called papilionaceous.

Types of aestivation in COROLLA : (a) Valvate (b) Twisted (c) Imbricate (d) Vexillary
Discussion