22339 + Interview Questions in Biology in Class 11 Page 400 InterviewSolution

19951.	Question : By which, Hydra conducts nerve impulse and stimulation ?(A) Nervenet(B) Nematocytes(C) Sensory cells(D) Nerve cells
Answer» NERVENET Nematocytes Sensory CELLS NERVE cells Solution :Nervenet

Discussion

19952.	Question : By which cause Dubb sound arises?
Answer» Closing of SEMILUNAR VALVE Closing of bicuspid valve. Closing of tricuspid valve Both (b) and (C) SOLUTION :Closing of semilunar valve

Discussion

19953.	Question :By what the major part of mammalian teeth is made up?
Answer» Root Pulp Dentin ENAMEL SOLUTION :N/A

Discussion

19954.	Question : By what method are lons absorbed by plants?
Answer» ALONG DPD gradient By molecular diffusion By carriers and pumps Along WATER potential gradients Answer :C

Discussion

19955.	Question : By the presence of which of the following can the family Brassicaceae be immediately identified ?
Answer» INFERIOR OVARY and cruciform corolla Tetradynamous stamens and AXILE placentation Tetradynamous stamens and replum Cruciform corolla and INDEHISCENT fruit Answer :C

Discussion

19956.	Question : By looking at which internal structure of a plant can youtell whether a plant is C_(3) or C_(4) ? Explain.
Answer» Solution :If mesophyll contains palisade PARENCHYMA and spongy CELL both then it is a `C_(3)` plant and if the leaf has palisade parenchyma CELLS, anad bundle sheath cells surrounded by vascular bundle, such is a Kranz anatomy it is a`C_(4)` plant.

Discussion

19957.	Question : By looking at a plant externally can you tell whether a plant is C_(3) or C_(4) ? Why and how ?
Answer» Solution :If the leaf has reticulate VENATION then it is a `C_(3)` PLANT and if the leaf has PARALLEL venation it is a `C_(4)` plant.

Discussion

19958.	Question : By looking at which internal structure of a plant can you tell whether a plant is C_(3) or C_(4)? Explain.
Answer» Solution :By studying the internal structure of a leaf, it is possible to tell whether the plant is `C_(3) or C_(4).`The vascular bundles of leaves in `C_(4)`PLANTS are called bundle SHEATH CELLS and show Kranz anatomy. The bundle sheath cells may form several layers around the vascular bundles. Each bundle sheath cell possess chloroplasts which are radially elongated. Chloroplasts in the cells of bundle sheath lack GRANA, while mesophyll chloroplasts are normal in `C _(3)` plants.

Discussion

19959.	Question : By looking at a plant externally can you tell whether a plant isC_(3)or C_(4)? When and how ?
Answer» Solution :By looking at a plant externally, it is not possible to tell whether a plant is `C_(3) or C_(4)`however PLANTS which are adapted to dry tropical regions have the `C_(4)`pathways. Such plants are able to tolerate high temperature and exhibit marked responses towards light intensities `C_(4)`plants also have a greater PRODUCTIVITY of biomass. However externally `C_(4)`plants do no show any SPECIAL characteristics.

Discussion

19960.	Question : What are ligases?Give example
Answer»

Discussion

19961.	Question : By giving proper examples describe the general characters of class - Osteichthyes.
Answer» Solution :OSTEICHTHYES includes both marine and fresh water FISHES with bony endoskeleton Their body is streamlined. Mouth is mostly terminal. They have four pairs of GILLS which are covered with cycloid/ctenoid scales. Air bladder is present which regulates buoyancy. Heart is two-chambered (one auricle and one ventricle). They are cold blooded animals. Sexes are separate. Fertilisation is usually external. They are mostly oviparous and development is direct. EXAMPLES : Marine - Exocoetus (Flying fish), Hippocampus (Sea horse), Freshwater - Labeo (Rohu), Catla (Katla), Clarias (Magur): Aquarium - Betta (Fighting fish), Pterophyllum (Angel fish).

Discussion

19962.	Question : By examining the four matchpairs given below,find the correct matched pair from the alternatives given below.
Answer» (i) and (II) (ii) and (IV) (ii) and (III) (i) and (iii) ANSWER :D

Discussion

19963.	Question : By counting number of QRS complexes, one can determine ......... of individual.
Answer» ANSWER :HEART BEAT

Discussion

19964.	Question : By anticlinal divisions, an organ increases in :
Answer» CIRCUMFERENCE VOLUME AREA LENGTH SOLUTION :circumference

Discussion

19965.	Question : Butterfly shaped corolla is seen in _____
Answer» rosaceous caryophyllaceous cruciform PAPILIONACEOUS Solution :papilionaceous

Discussion

19966.	Question : Bundle of His is a part of which one of the following organs in humans ?
Answer» Stomach Brain Kidney Heart Answer :D

Discussion

19967.	Question : ‘Bundle of His' is a group of
Answer» GANGLIA nerve FIBRES muscle fibres connective TISSUE SOLUTION :muscle fibres

Discussion

19968.	Question : Bulliform cells in a grass leaf are useful for
Answer» Transpiration Conduction Rolling and UNROLLING of LEAVES GROWTH of leaves Answer :C

Discussion

19969.	Question : Bulliform cells are present in maize leave.
Answer» SOLUTION :In a maize leaf, group of 5 to 7 cells without chloroplasts and cuticle of large size are located at certain distance in UPPER epidermis in which small and slanted, unicellular trichomers are located on both lateral sides. When moisture DECREASES and DRYNESS increases in atmosphere then mechanical cells lose water. So cells loe turgidity, leaf lamina curls. Thus due to decrease in area of leaf lamina, transpiration is prevented. These cells smell by absorbing water in humid atmosphere. So leaf is EXPOSED. So these cells are also called water absorbent cells. Thus these cells induce movement of leaves so0 they are also called mechanical cells. Thus bulliform cells are seen in a maize leaf.

Discussion

19970.	Question : Bulliform cells are modified ______
Answer» EPIDERMIS Xylem Phloem Pericycle Answer :D

Discussion

19971.	Question : Bulliform cells are formed in the epidermis of ............ leaf.
Answer» SOLUTION :MONOCOT

Discussion

19972.	Question : Bulliform cells are found in the leaves of
Answer» VALLISNERIA MAIZE NERIUM Opuntia Answer :B

Discussion

19973.	Question : Bulliform cells are found in
Answer» The epidermis of MONOCOT stem The ADAXIAL epidermis of grass LEAF Abaxial epidermis of DICOT leaf The adaxial epidermis of DORSIVENTRAL leaf Answer :B

Discussion

19974.	Question : Bulliform cells are
Answer» Sclerenchymatous cells Parenchymatous cells Large sized COLLENCHYMA cells Water filled and HIGHLY vacuolated EPIDERMAL cells Answer :D

Discussion

19975.	Question : Bulk portion of primary organs in plants is made up of
Answer» COLLENCHYMA PARENCHYMA Sclerenchyma Vascular tissue Answer :B

Discussion

19976.	Question : Bulging of eyes, increased BMR, BP andheart rate are symptoms of
Answer» cretinism myxedema GOITRE exophthalmic goitre

Discussion

19977.	Question : Bulbs of garlic & onion have
Answer» No leaves No STEM GREATLY reduced stem No roots Answer :C

Discussion

19978.	Question : Bulbils occur in the algae………
Answer» Pithophora Chlorella Spharcelaria Chlamydomonas Answer :C

Discussion

19979.	Question : Bulb :
Answer» SOLUTION :ONION is a BULB. It is covered by dry SCALY leaves.

Discussion

19980.	Question : Buds give rise to vegetative branches only.
Answer» ANSWER :FALSE

Discussion

19981.	Question :'Bubonic plague' is transmitted by
Answer» RAT flea Mosquito Cockroach House fly Answer :A

Discussion

19982.	Question : Buccopharyngealrespiration in frog:
Answer» is INCREASED when nostrils are closed STOPS when there is pulmonary respiratio is increased when it is catching fly stops when MOUTH is opened. Answer :B

Discussion

19983.	Question : Buccal diverticulum of hemichorates is called
Answer» gizzard stomochord NOTOCHORD VERTEBRAL COLUMN ANSWER :B

Discussion

19984.	Question : Bryophytes that prevent soil erosion by forming dense mats on the soil are
Answer» Ferns Kelps Horsetails Mosses ANSWER :D

Discussion

19985.	Question : Bryophytes show alternation of generation. Which phase is dominant in them?
Answer» SOLUTION :GAMETOPHYTIC PHASE.

Discussion

19986.	Question : Bryophytes have a life cycle with alternation of a haploid,sexual generation with a diploid, asexual generation. Unlike vascular plants, in bryophytes the ........ is usually larger than the …………..
Answer» SOLUTION :GAMETOPHYTE , SPOROPHYTE

Discussion

19987.	Question : Bryophytes need water for fertilization ' - Justify the statement.
Answer» Solution :1. Yes. In bryophytes sexual reproduction occurs in GAMETOPHYTE (dominant phase). 2. The antherozoids have flagella and SWIM in a thin FILM of water to REACH the archegonium. 3. They fuse with the egg and from the ZYGOTE which initiates the sporophyte. 4. Thus without water the life cycle of a bryophyte cannot be completed.

Discussion

19988.	Question : Bryophytes maintain soil texture- comment.
Answer» SOLUTION :Bryophytes PLAY a MAJOR ROLE in soil formation through succession and help in soil conservation.

Discussion

19989.	Question : Bryophytes exhibit two successive generations,gametophytes and sporophytes. These phases alternate each other. Name this phenomenon.
Answer» SOLUTION :ALTERNATION of GENERATION.

Discussion

19990.	Question : Bryophytes completely lack………….
Answer» VASCULAR TISSUE SYSTEM PITH haploid. Rhizoids Answer :A

Discussion

19991.	Question : Bryophytes are called amphibians of the plant kingdom because
Answer» BRYOPHYTES can live in soil but are dependent on WATER for sexual reproduction They USUALLY occur in damp, humid and shaded area They play an important role in plant succession on bare ROCKS and soil. All of the above Solution :Bryophytes are called amphibians of the plant kingdom because bryophytes can live in soil but are dependent on water for sexual reproduction.

Discussion

19992.	Question : Bryophytes are characterized by the presence ofconspicuous ............. gametophytes andnutritionally ........... ............ Sporophytes.
Answer» SOLUTION :INDEPENDENT , DEPENDENT

Discussion

19993.	Question : Bryophytes are called amphibians of plant kingdom because
Answer» They LIVE in both land and water They are DEPENDENT on water for fertilization Both A and B None of the above Solution :Bryophytes are called AMPHIBIANS of PLANT kingdom because they are dependent on water for fertilization.

Discussion

19994.	Question : Bryophytes are amphibians of the platn kingdom because
Answer» They require a layer of WATER for carrying out sexual reproduction They OCCUR in DAMP places They are MOSTLY aquatic All the above Answer :B

Discussion

19995.	Question : Why Bryophytes are called amphibians of plant kingdom ?
Answer» Solution :BRYOPHYTES are called as 'amphibians of plant KINGDOM' because they NEED WATER for completing their life cycle.

Discussion

19996.	Question : Why are Bryophytes are amphibians of plant kingdom?
Answer» ANSWER :1

Discussion

19997.	Question : Bryophytes are
Answer» FIRST thallophytes first spermatophytes first embryophytes first tracheophytes Answer :C

Discussion

19998.	Question : Bryophyte has little/significant economical importance.
Answer» SOLUTION :LITTLE

Discussion

19999.	Question : Bryophyllum and Dioscorea are example for
Answer» FOLIAR BUD, APICAL bud foliar bud, CAULINE bud cauline bud, apical bud cauline bud, foliar bud Solution :foliar bud, cauline bud

Discussion

20000.	Question : Brush-bordered cuboidal epithelial cells bear ………on their free ends.
Answer» SOLUTION :MICROVILLI

Discussion

Explore topic-wise InterviewSolutions in .

Question : By which, Hydra conducts nerve impulse and stimulation ?(A) Nervenet(B) Nematocytes(C) Sensory cells(D) Nerve cells

Question : By which cause Dubb sound arises?

Question :By what the major part of mammalian teeth is made up?

Question : By what method are lons absorbed by plants?

Question : By the presence of which of the following can the family Brassicaceae be immediately identified ?

Question : By looking at which internal structure of a plant can youtell whether a plant is C_(3) or C_(4) ? Explain.

Question : By looking at a plant externally can you tell whether a plant is C_(3) or C_(4) ? Why and how ?

Question : By looking at which internal structure of a plant can you tell whether a plant is C_(3) or C_(4)? Explain.

Question : By looking at a plant externally can you tell whether a plant isC_(3)or C_(4)? When and how ?

Question : What are ligases?Give example

Question : By giving proper examples describe the general characters of class - Osteichthyes.

Question : By examining the four matchpairs given below,find the correct matched pair from the alternatives given below.

Question : By counting number of QRS complexes, one can determine ......... of individual.

Question : By anticlinal divisions, an organ increases in :

Question : Butterfly shaped corolla is seen in _____

Question : Bundle of His is a part of which one of the following organs in humans ?

Question : ‘Bundle of His' is a group of

Question : Bulliform cells in a grass leaf are useful for

Question : Bulliform cells are present in maize leave.

Question : Bulliform cells are modified ______

Question : Bulliform cells are formed in the epidermis of ............ leaf.

Question : Bulliform cells are found in the leaves of

Question : Bulliform cells are found in

Question : Bulliform cells are

Question : Bulk portion of primary organs in plants is made up of

Question : Bulging of eyes, increased BMR, BP andheart rate are symptoms of

Question : Bulbs of garlic & onion have

Question : Bulbils occur in the algae………

Question : Bulb :

Question : Buds give rise to vegetative branches only.

Question :'Bubonic plague' is transmitted by

Question : Buccopharyngealrespiration in frog:

Question : Buccal diverticulum of hemichorates is called

Question : Bryophytes that prevent soil erosion by forming dense mats on the soil are

Question : Bryophytes show alternation of generation. Which phase is dominant in them?

Question : Bryophytes have a life cycle with alternation of a haploid,sexual generation with a diploid, asexual generation. Unlike vascular plants, in bryophytes the ........ is usually larger than the …………..

Question : Bryophytes need water for fertilization ' - Justify the statement.

Question : Bryophytes maintain soil texture- comment.

Question : Bryophytes exhibit two successive generations,gametophytes and sporophytes. These phases alternate each other. Name this phenomenon.

Question : Bryophytes completely lack………….

Question : Bryophytes are called amphibians of the plant kingdom because

Question : Bryophytes are characterized by the presence ofconspicuous ............. gametophytes andnutritionally ........... ............ Sporophytes.

Question : Bryophytes are called amphibians of plant kingdom because

Question : Bryophytes are amphibians of the platn kingdom because

Question : Why Bryophytes are called amphibians of plant kingdom ?

Question : Why are Bryophytes are amphibians of plant kingdom?

Question : Bryophytes are

Question : Bryophyte has little/significant economical importance.

Question : Bryophyllum and Dioscorea are example for

Question : Brush-bordered cuboidal epithelial cells bear ………on their free ends.