22339 + Interview Questions in Biology in Class 11 Page 270 InterviewSolution

13451.	Question : Osteocytes are present in fluid filled cavities known as
Answer» OSSEIN lamellac CANALICULI lacunae Answer :D

Discussion

13452.	Question : Osphradium is meant for ………………. .
Answer» EXCRETION nutrition SELECTION and rejection of food GRINDING of food Solution :selection and rejection of food

Discussion

13453.	Question : Osphradium of Pila globosa is …………….. .
Answer» THERMORECEPTOR PHERETIMA CHEMORECEPTOR tangoreceptor SOLUTION :chemoreceptor

Discussion

13454.	Question : Osmotic potential is given a ………………...Sign because it is not a real pressure.
Answer» SOLUTION :NEGATIVE

Discussion

13455.	Question : Osmotic pressure is represented by Greek letter ........ .
Answer» `ALPHA` `pi` `PSI` `theta` ANSWER :B

Discussion

13456.	Question : Osmotic pressure and osmatic potential
Answer» SOLUTION :The hydrostatic pressure which balances and prevents the OSMOTIC inflow of water into concentrated solution is called osmotic pressure. Osmotic POTENTIAL is the potential of a solution to cause water movement into it across a partially permeable membrane as a result of DISSOLVED SOLUTES

Discussion

13457.	Question : Osmosis is the passage of water through a ...................... membrane from …………...... concentration of water molecules to ……………………… concentration
Answer» SOLUTION :semi-permeable, HIGHER,LOWER

Discussion

13458.	Question : Osmosis is concerned with the movement of water only and cannot directly affect the movement of dissolved substances into the roots and through the plant.
Answer» True False Answer :1

Discussion

13459.	Question : Osmosis is a special kind of diffusion, through which water diffuses across the cell membrane the rate and direction of osmosis depends upon
Answer» PRESSURE gradient concentration gradient both `(a)`and `(B)` NONE of these. Answer :C

Discussion

13460.	Question : Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. The rate and direction of osmosis depends upon both ……..
Answer» SOLUTION :The net DIRECTION and rate of osmosis DEPEND on both the pressure GRADIENT and concentration gradient.

Discussion

13461.	Question : Osmosis can be demonstrated by
Answer» POTATO OSMOMETER Thistle FUNNEL experiment Cobalt-chloride papre method Both A and B Solution :OSMOSIS can be DEMONSTRATED by potato osmometer and thistle funnel experiment

Discussion

13462.	Question : Osmosis involves the physiological processes that
Answer» MAINTAIN SHAPE of the plant maintain growth of young cells maintain TURGOR of guard cells all of the above Answer :D

Discussion

13463.	Question : Osmoregulation or homeostasis is the function of
Answer» tufted NEPHRIDIA CLOSED nephridia both 1 & 2 enteronephric nephridia ANSWER :D

Discussion

13464.	Question :Osmosis and Imbibition
Answer» Solution :Osmosis is a physiological PROCESS that occurs due to osmotic pressure gradient. A semipermeable MEMBRANE involvement is essential for the process. In it. water diffuses only in liquid FORM and no heat is generated in the process. Whereas imbibition is a physical process that occurs due to various phenomena-diffusion, capillary force and surface tension Presence of semipermeable membrane is not essential for the process. In it, water is absorbed/imbibed in liquid as WELL as in vapour form and heat is generated in the process.

Discussion

13465.	Question : Osmoregulation is the function of
Answer» prolactin oxytocin vasopressin None of these

Discussion

13466.	Question : Orthostatic reflex triggers baroreceptor reflex and increases the mean ............
Answer» SOLUTION :ARTERIAL PRESSURE.

Discussion

13467.	Question : Ornamental shrub of Solanaceae is
Answer» KAMANCHI WITHANIA Cestrum Atropa ANSWER :C

Discussion

13468.	Question : Origin of species is the book written by ……………… .
Answer» John Ray CHARLES DARWIN LINNAEUS Aristotle ANSWER :B

Discussion

13469.	Question : Origin of fishes occurred in ____ period
Answer» Devonian Silurian Cambrian Permian Answer :B

Discussion

13470.	Question :Organisms which thrive in skin folds such as groin or between toes of humans are
Answer» ROUND WORMS Pinworms RING worms FLAT worms Answer :C

Discussion

13471.	Question : Organisms with two different types ofsymmetries in two differnet stages of life are
Answer» SPONGES ANNELIDS MOLLUSCS ECHINODERMS ANSWER :D

Discussion

13472.	Question : Organisms that often bloom in polluted water bodies
Answer» ARCHAEBACTERIA EUBACTERIA MYCOPLASMA Cyanobacteria Answer :D

Discussion

13473.	Question : Organisms that are capable to fix nitrogen in aquatic habitats are ……………………………….
Answer» SOLUTION :CYANOBACTERIA

Discussion

13474.	Question : Organisms responsible for red tides in seas.
Answer» SOLUTION :DINOFLAGELLATES

Discussion

13475.	Question : Organisms living in salty areas are called as (A) Methanogens (B) Halophiles (C) Heliophytes (D)Thermoacidophiles
Answer» METHANOGENS Halophiles heliophytes thermoacidophiles Solution :Halophiles are organisms that live in areas of high concentration of salts. The name halophilesis originated from the greek word that means .salt loving.. Whereas heliophytes are the plants that GROW best in sunlight and can not survive in salty conditions. Methanogens are the bacteria that produces methane as a METABOLIC by products in anaerobic conditions. Thermoacidophiles are archaebacteria striving under strong ACIDIC environments and high temperatures, but can not tolerate high salt concentrations AROUND them.

Discussion

13476.	Question : Organisms grow by ______
Answer» CELL division spore FORMATION FRAGMENTATION vegetative PROPAGATION ANSWER :A

Discussion

13477.	Question : Organisms called methanogens are most abundant in a
Answer» SULPHUR ROCK CATTLE yard Polluted stream Hot spring Answer :B

Discussion

13478.	Question : Organisms attached to substratum generally possesses
Answer» ASYMMETRICAL body Radial symmetry One single opening of DIGESTIVE canal Cilia on the SURFACE to create water current Answer :B

Discussion

13479.	Question : Organism with shortest gestation period is
Answer» DUCK -BILLED paltypus OPOSSUM elephant RABBIT Answer :B

Discussion

13480.	Question : Organism which causes pertussis is
Answer» virus FUNGUS GRAM POSITIVE bacillus Gram NEGATIVE bacillus Answer :D

Discussion

13481.	Question : Viruses are living or non - living?
Answer» Solution :Viruses are microscopic organisms that have characteristics of both living and non-living. A virus consists of a strand of DNA or RNA covered by a protein coat. This presence of nucleic acid (DNA or RNA) SUGGESTS that viruses are alive. In addition, they can also a RESPOND to their environment (inside the HOST cell) in a limited manner. However, some other characters, such as their inability to reproduce without using the host cell machinery and their ACELLULAR nature INDICATE that viruses are non-living. Therefore, classifying viruses has remained as mystery for modern systematics.

Discussion

13482.	Question : Organelles involved in the protection of cell from microbes and effect of H_2O_2 respectively are
Answer» LYSOSOMES and GLYOXYSOMES Peroxysomes and glyoxysomes ER and GOLGI complex Lysosomes and peroxysomes ANSWER :D

Discussion

13483.	Question : Organic substances such as sugars are translocated in the phloem. It can be demonstrated by
Answer» ringing the stem root pressure grafting defoliation. Solution :In girdling or ringing experiments (Malpighi,1675)`, a ring fo bark is CUT from the stem. It also removes phloem. Nutrients collect above the ring where the bark also swells up and may give rise to adventitious roots. Growth is also VIGOROUS above the ring The TISSUES below the ring not only show stoppage of growth but also begin to shrivel Roots can be starved and killed if the ring is not healed after some time. Killing of roots shall kill the whole PLANT clearly showing that bark or phloem is involved in the movement of organic solutes towards root.

Discussion

13484.	Question : Organelles :
Answer» are typical of eukaryotic cells, not PROKARYOTIC cells separate chemical reactions in time and space are membrane-bound COMPARTMENTS all of the above are FEATURES of the organelles ANSWER :D

Discussion

13485.	Question : ______organelle plays a major role in post translation process of protein
Answer» GOLGI BODIES Nucleolus Ribosomes ER Solution :Golgi bodies

Discussion

13486.	Question : Organelle rich in Manganese is
Answer» RIBOSOME MITOCHONDRIA CHLOROPLAST NUCLEUS ANSWER :D

Discussion

13487.	Question : Organelle lacking DNA, but capable of duali cation is
Answer» Ribosome Centriole CHLOROPLAST NUCLEUS ANSWER :B

Discussion

13488.	Question : Organelle important in spindle formation during nuclear division is
Answer» GOLGI body chloroplast centriole mitochondrion Answer :C

Discussion

13489.	Question :Organ transplant rejection may be prevented by using
Answer» anti-histamine STEROID DRUGS CYCLOSPORIN immunostimulatory drugs Answer :C

Discussion

13490.	Question : Organ system level of organisation is shown by
Answer» all MULTICELLULAR animals triploblastic animals cnidarians sponges Answer :B

Discussion

13491.	Question : Organ system level of organisation appeared for the first time in the members of
Answer» PLATYHELMINTHES NEMATODA ANNELIDA ARTHROPODA ANSWER :A

Discussion

13492.	Question : Organ of corti consists of phonoreceptors and supporting cells.
Answer» ANSWER :TRUE

Discussion

13493.	Question : Organ of Corti rests on
Answer» reissner's MEMBRANE basilar membrane schneiderian membrane robertsonian membrane

Discussion

13494.	Question : Organ level of organisation is present in the members of
Answer» NEMATODA Cnidaria PLATYHELMINTHES Annelida Answer :C

Discussion

13495.	Question : Order : Describe/Explain Order.
Answer» SOLUTION :Order and other higher taxonomic categories are identified based on the AGGREGATES of CHARACTERS. Order being a higher category, is the assemblage of families which exhibit a few similar characters. The similar characters are less in number as compared to different genera included in a family. Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales mainly based on the floral characters. The animal order, CARNIVORA, includes families like FELIDAE and Canidae.

Discussion

13496.	Question : OPVwas prepared by
Answer» JONAS Salk Sabein ET al Alexander Fleming Louis Pasteur Answer :B

Discussion

13497.	Question : Opuntia has phylloclade.
Answer» Solution :Opuntia is a xerophytic PLANT. Due to dry atmosphere, less water is available from soil. So to prevent waste of water, leaves are shed or became small or get CONVERTED into stipulelspine. Thus in ABSENCE of leaves to perform photosynthesis, Stem becomes broad, flat green and fused with chlorophyll that acts as a leaf. Thus the modification of stem to leaf like STRUCUTRE is called PHYLLOCLADE.

Discussion

13498.	Question : Opuntia is a xerophyte which accumulate water in itsflattened stem. (True/false)
Answer» ANSWER :1

Discussion

13499.	Question : Opisthopora is the order of
Answer» EARTHWORMS COCKROACHES FROGS SPONGES ANSWER :A

Discussion

13500.	Question : Ophiura is without
Answer» DIGESTIVE SYSTEM WATER VASCULAR system excretory system larva in development Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : Osteocytes are present in fluid filled cavities known as

Question : Osphradium is meant for ………………. .

Question : Osphradium of Pila globosa is …………….. .

Question : Osmotic potential is given a ………………...Sign because it is not a real pressure.

Question : Osmotic pressure is represented by Greek letter ........ .

Question : Osmotic pressure and osmatic potential

Question : Osmosis is the passage of water through a ...................... membrane from …………...... concentration of water molecules to ……………………… concentration

Question : Osmosis is concerned with the movement of water only and cannot directly affect the movement of dissolved substances into the roots and through the plant.

Question : Osmosis is a special kind of diffusion, through which water diffuses across the cell membrane the rate and direction of osmosis depends upon

Question : Osmosis is a special kind of diffusion, in which water diffuses across the cell membrane. The rate and direction of osmosis depends upon both ……..

Question : Osmosis can be demonstrated by

Question : Osmosis involves the physiological processes that

Question : Osmoregulation or homeostasis is the function of

Question :Osmosis and Imbibition

Question : Osmoregulation is the function of

Question : Orthostatic reflex triggers baroreceptor reflex and increases the mean ............

Question : Ornamental shrub of Solanaceae is

Question : Origin of species is the book written by ……………… .

Question : Origin of fishes occurred in ____ period

Question :Organisms which thrive in skin folds such as groin or between toes of humans are

Question : Organisms with two different types ofsymmetries in two differnet stages of life are

Question : Organisms that often bloom in polluted water bodies

Question : Organisms that are capable to fix nitrogen in aquatic habitats are ……………………………….

Question : Organisms responsible for red tides in seas.

Question : Organisms living in salty areas are called as (A) Methanogens (B) Halophiles (C) Heliophytes (D)Thermoacidophiles

Question : Organisms grow by ______

Question : Organisms called methanogens are most abundant in a

Question : Organisms attached to substratum generally possesses

Question : Organism with shortest gestation period is

Question : Organism which causes pertussis is

Question : Viruses are living or non - living?

Question : Organelles involved in the protection of cell from microbes and effect of H_2O_2 respectively are

Question : Organic substances such as sugars are translocated in the phloem. It can be demonstrated by

Question : Organelles :

Question : ______organelle plays a major role in post translation process of protein

Question : Organelle rich in Manganese is

Question : Organelle lacking DNA, but capable of duali cation is

Question : Organelle important in spindle formation during nuclear division is

Question :Organ transplant rejection may be prevented by using

Question : Organ system level of organisation is shown by

Question : Organ system level of organisation appeared for the first time in the members of

Question : Organ of corti consists of phonoreceptors and supporting cells.

Question : Organ of Corti rests on

Question : Organ level of organisation is present in the members of

Question : Order : Describe/Explain Order.

Question : OPVwas prepared by

Question : Opuntia has phylloclade.

Question : Opuntia is a xerophyte which accumulate water in itsflattened stem. (True/false)

Question : Opisthopora is the order of

Question : Ophiura is without