NEET
Given graph show variation with time .then the of projectile hmax ?
Gangundi Varsshinie answered • 19 minutes agoGraph kaha hai ji
Hardev Singh asked • 15 minutes agoWhich of the following statements is true for a secretory cell?- a)Golgi apparatus is absent
- b)Only Smooth Endoplasmic Reticulum (SER) is present
- c)Rough Endoplasmic Reticulum (RER) is easily observed in the cell
- d)Secretory granules are formed in nucleus
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements is true for a secretory cell?
a)
Golgi apparatus is absent
b)
Only Smooth Endoplasmic Reticulum (SER) is present
c)
Rough Endoplasmic Reticulum (RER) is easily observed in the cell
d)
Secretory granules are formed in nucleus
A black body is at 727° C. It emits energy at a rate which is proportional to [2007]- a)(1000)4
- b)(1000)2
- c)727)4
- d)(727)2
Correct answer is option 'A'. Can you explain this answer?
A black body is at 727° C. It emits energy at a rate which is proportional to [2007]
a)
(1000)4
b)
(1000)2
c)
727)4
d)
(727)2
Ayush035 answered • 6 hours agoQ/t= sigma t^4
so temperature is in Kelvin
so on that
1000^4
thank you:,-)
so temperature is in Kelvin
so on that
1000^4
thank you:,-)
Which is smallest cell either mycoplasma or PPLO?
Ashwin Singh answered • 8 hours agoNcert ne book me mycoplasma ko smallest living cell khaa hee....but in reality pplo is smaller than mycoplasma
Sainath Reddy asked • 2 hours agoWhere the energy barrier for interconversion of staggered
eclipsed conformation for ethane is 12.55 kJ/mol, it is 45 kJ/mol for C2Cl6 . Which of these correctly explains this? - a)Chlorine atoms are less electronegative, they repel more due to presence of δ + charges on them
- b)Chlorine atoms are larger in size so repulsions are more
- c)Bond length of C − Cl bond is more so they repel more
- d)Chlorine atoms have lone pairs in delocalization with carbon
Correct answer is option 'B'. Can you explain this answer?
Where the energy barrier for interconversion of staggered eclipsed conformation for ethane is 12.55 kJ/mol, it is 45 kJ/mol for C2Cl6 . Which of these correctly explains this?
eclipsed conformation for ethane is 12.55 kJ/mol, it is 45 kJ/mol for C2Cl6 . Which of these correctly explains this? a)
Chlorine atoms are less electronegative, they repel more due to presence of δ + charges on them
b)
Chlorine atoms are larger in size so repulsions are more
c)
Bond length of C − Cl bond is more so they repel more
d)
Chlorine atoms have lone pairs in delocalization with carbon
Heart is present in which area?
Kaviya Lakshmi answered • 10 hours agoThe human heart is located within the thoracic cavity, medially between the lungs in the space known as the mediastinum
A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is[1993]- a)Cork cambium
- b)Vascular cambium
- c)Endodermis
- d)Pericycle
Correct answer is option 'B'. Can you explain this answer?
A narrow layer of thin walled cells found between phloem/bark and wood of a dicot is
[1993]
a)
Cork cambium
b)
Vascular cambium
c)
Endodermis
d)
Pericycle
Kaviya Lakshmi answered • 11 hours agoIn dicotyledonous stems of temperate trees, during secondary growth, vascular cambial ring(narrow layer of thin-walled cells) produces secondary phloem towards outer side and secondary xylem or wood towards inner side. So, the correct option is ‘vascular cambium’.
Who asserted that the natural state of body is the state of rest?
Kaviya Lakshmi answered • 11 hours ago Aristotle asserted that object stay in motion only if they are pushed, but left to
themselves object come to a state of rest. So the state of “rest” is the natural state of motion to which all
things return.
Vinay Nagar asked • 5 hours agoIn the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A charged particle undergoes non-rectilinear motion in a constant magnetic field. The only force acting on the particle is the magnetic force. Then kinetic energy of this particle remains constant but momentum of the particle changes.
Reason(R) : A force that always acts on the particle in direction perpendicular to its velocity does no work on the particle. But whenever a force acts on the particle, momentum of the particle changes.- a)Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- b)Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
- c)Assertion is true but Reason is false.
- d)Assertion is false but Reason is true.
Correct answer is option 'B'. Can you explain this answer?
In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A charged particle undergoes non-rectilinear motion in a constant magnetic field. The only force acting on the particle is the magnetic force. Then kinetic energy of this particle remains constant but momentum of the particle changes.
Reason(R) : A force that always acts on the particle in direction perpendicular to its velocity does no work on the particle. But whenever a force acts on the particle, momentum of the particle changes.
Assertion(A): A charged particle undergoes non-rectilinear motion in a constant magnetic field. The only force acting on the particle is the magnetic force. Then kinetic energy of this particle remains constant but momentum of the particle changes.
Reason(R) : A force that always acts on the particle in direction perpendicular to its velocity does no work on the particle. But whenever a force acts on the particle, momentum of the particle changes.
a)
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
b)
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
c)
Assertion is true but Reason is false.
d)
Assertion is false but Reason is true.
When a tree grows older which of the following increase rapidly -- a)Heart wood
- b)Sap wood
- c)Pith
- d)Cortex
Correct answer is option 'A'. Can you explain this answer?
When a tree grows older which of the following increase rapidly -
a)
Heart wood
b)
Sap wood
c)
Pith
d)
Cortex
Ragini Shukla answered • 12 hours agoIn old trees , the greater part of the secondary xylem is dark brown due to the deposition of the organic compounds like resins , gums , oils aromatic substance and tannins in the innermost layers of the stem . These substances make it hard, durable and resistant towards the attack of microorganisms and insects. This region comprises dead elements with highly lignified walls and it is known as the... more
Os-cordis a bone in-- a)Whale
- b)Bats
- c)Cattle
- d)Polar bear
Correct answer is option 'C'. Can you explain this answer?
Os-cordis a bone in-
a)
Whale
b)
Bats
c)
Cattle
d)
Polar bear
Ragini Shukla answered • 12 hours agoThe cardiac skeleton provides the rigidity to prevent the dilatation of valves and outflow tracts , give attachment to valves leaflets and myocardium and electrically isolates the atria from the ventricle. The presence of OS CORDIS is a regular finding in the large ruminants such as in cattles, like ox, buffaloes, sheeps and etc but it is not reported in other mammals. In cattles the OS CORDIS is... more
Among the following sets of fruits ,those that belong to the same category ,from the point of veiw of classification are- a)Coconut,chestnut and cashewnut
- b)Coconut ,mango and almond
- c)Coconut ,betelnut and chestnut
- d)Coconut ,orange and tomato
Correct answer is option 'B'. Can you explain this answer?
Among the following sets of fruits ,those that belong to the same category ,from the point of veiw of classification are
a)
Coconut,chestnut and cashewnut
b)
Coconut ,mango and almond
c)
Coconut ,betelnut and chestnut
d)
Coconut ,orange and tomato
Rakesh Kumar answered • 12 hours agoFruit of coconut mango and almond called drup
Multiple alleles are present:- a)On non-sister chromatids
- b)On different chromosomes
- c)At different loci on the same chromosome
- d)At the same locus of the chromosome
Correct answer is option 'D'. Can you explain this answer?
Multiple alleles are present:
a)
On non-sister chromatids
b)
On different chromosomes
c)
At different loci on the same chromosome
d)
At the same locus of the chromosome
Kaviya Lakshmi answered • 12 hours agoMultiple alleles refer to the presence of more than two alternate forms of a gene which should be accommodated on two loci on a homologous pair. This is facilitated by the presence of more than one allele on the same locus of a chromosome provided one allele is present at a locus at a time. Thus, the correct answer is option D.
Coconut water from a tender coconut is [2015 RS]- a)Free nuclear endosperm
- b)Innermost layers of the seed coar
- c)Degenerated nucellus
- d)Immature emryo
Correct answer is option 'A'. Can you explain this answer?
Coconut water from a tender coconut is [2015 RS]
a)
Free nuclear endosperm
b)
Innermost layers of the seed coar
c)
Degenerated nucellus
d)
Immature emryo
Kaviya Lakshmi answered • 12 hours agoTender coconut water is a clear liquid found inside of the young tender coconut. During the nuclear phase of the development, it provides as a termination for the endosperm of the coconut. In the nuclear endosperm formation, free-nuclear divisions are repeatedly done; if a cell wall is developed it will form after free-nuclear divisions. Commonly referred to as liquid endosperm. Coconut water from... more
Shrikant Kulkarni asked • 6 hours agoWhat would occur if sodium bicarbonate ions were removed from pancreatic juice?- a)Decreased amounts of bile would be released
- b)Increased H2O absorption would occur in the col
- c)The cells lining the small intestine would be damaged
- d)Digestion of nutrients in the small intestine would increase
Correct answer is option 'C'. Can you explain this answer?
What would occur if sodium bicarbonate ions were removed from pancreatic juice?
a)
Decreased amounts of bile would be released
b)
Increased H2O absorption would occur in the col
c)
The cells lining the small intestine would be damaged
d)
Digestion of nutrients in the small intestine would increase
PCR and restriction fragment length polymorphism are methods for- a)Genetic fingerprinting
- b)Genetic transformation
- c)DNA sequencing
- d)Study of enzymes
Correct answer is option 'A'. Can you explain this answer?
PCR and restriction fragment length polymorphism are methods for
a)
Genetic fingerprinting
b)
Genetic transformation
c)
DNA sequencing
d)
Study of enzymes
Kaviya Lakshmi answered • 13 hours agoPCR and RFLP are the methods used for genetic fingerprinting. DNA fragmentation plays an important part in forensics, especially that of DNA profiling. Restriction fragment length polymorphism (RFLP) analyses the variable lengths of DNA fragments which are formed from the digestion of a DNA sample with a restriction endonuclease. They are then hybridized with DNA probes that bind to a complementar... more
PATIL MRUNALI RAJENDRA asked • 7 hours agoThe agarose gel with high % of agar will lead to accumulation of large sized DNA fragment near the wells as:- a)Absence of pores
- b)Pore size is small
- c)Voltage fluctuation with high % of agar
- d)Pore size is big
Correct answer is option 'B'. Can you explain this answer?
The agarose gel with high % of agar will lead to accumulation of large sized DNA fragment near the wells as:
a)
Absence of pores
b)
Pore size is small
c)
Voltage fluctuation with high % of agar
d)
Pore size is big
What is not true about sclereids?[1996]- a)These are parenchyma cells with thickened lignified walls
- b)These are elongated and flexible with tapered ends
- c)These are commonly found in the shells of nuts and in the pulp of guava, pear, etc
- d) These are also called the stone cells
Correct answer is option 'A'. Can you explain this answer?
What is not true about sclereids?
[1996]
a)
These are parenchyma cells with thickened lignified walls
b)
These are elongated and flexible with tapered ends
c)
These are commonly found in the shells of nuts and in the pulp of guava, pear, etc
d)
These are also called the stone cells
Kaviya Lakshmi answered • 15 hours agoCorrect option (a) These are parenchyma cells with thickened lignified walls Explanation Sclereids are broad sclerenchyma cells which may be oval, spherical, cylindrical, or stellate ln structure. Sclereids develop from sclerenchyma cells, occur singly or in groups to provide stiffness. These may be of different types, such as brachysclereids (stone cells) found in grit of pear, apple, macrosclere... more
The most appropriate definition of an ovule/seed in terms of homologous structures is that it is- a)Integumented indehiscent sporangium having a single spore
- b)Integumented gynosporangium
- c)Integumented indehiscent megasporangium with a single megaspore
- d)Integumented bud containing an egg
Correct answer is option 'C'. Can you explain this answer?
The most appropriate definition of an ovule/seed in terms of homologous structures is that it is
a)
Integumented indehiscent sporangium having a single spore
b)
Integumented gynosporangium
c)
Integumented indehiscent megasporangium with a single megaspore
d)
Integumented bud containing an egg
Kaviya Lakshmi answered • 15 hours agoMegasporangium" is a technical term given to an ovule, which contains nucellus, integuments and funiculus through which it is adhered to the placenta. In simple words, megasporangium along with its protective coverings, the integuments, is called ovule. Integuments cover an opening called micropyle, through which pollen tube enters the ovule during fertilisation. Thus, ovule is an integumented deh... more
What is true about leucocytes ? [2000]- a)Their sudden fall in number is indication of blood cancer
- b)These are produced in thymus
- c)These are enucleated
- d)These can squeeze out through the capillary walls
Correct answer is option 'D'. Can you explain this answer?
What is true about leucocytes ? [2000]
a)
Their sudden fall in number is indication of blood cancer
b)
These are produced in thymus
c)
These are enucleated
d)
These can squeeze out through the capillary walls
Kaviya Lakshmi answered • 16 hours agoLeucocytes or White blood cells (WBCs) can squeeze out through capillary walls into the tissue and reach the site of injury. This process is known as diapedesis. Hence option D is correct.
Arun Pareek asked • 8 hours agoConsider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is- a)3K
- b)4/3 K
- c)2/3 K
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
a)
3K
b)
4/3 K
c)
2/3 K
d)
none of these
As the age advances, there is a gradual thinning of hair in human males. This is mainly because of lowered [2000]- a)blood supply
- b)synthesis of proteins
- c)synthesis of glycogen
- d)availability of energy
Correct answer is option 'B'. Can you explain this answer?
As the age advances, there is a gradual thinning of hair in human males. This is mainly because of lowered [2000]
a)
blood supply
b)
synthesis of proteins
c)
synthesis of glycogen
d)
availability of energy
Kaviya Lakshmi answered • 16 hours agoIn vertebrates a protein named keratin constitutes almost the dry weight of hair. Therefore as the age advances metabolism decreases, synthesis of protein decreases leading to thinning of hair.
Prasanth Rajesh asked • 8 hours agoIn a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy E₀ and the radius r₀ of the first orbit will be (a₀ is the Bohr radius)- a)E₀ = -27.2 eV; r₀ = a₀/2
- b)E₀ = -27.2 eV; r₀ = a₀
- c)E₀ = -13.6 eV; r₀ = a₀/2
- d)E₀ = -13.6 eV; r₀ = a₀
Correct answer is option 'A'. Can you explain this answer?
a)
E₀ = -27.2 eV; r₀ = a₀/2
b)
E₀ = -27.2 eV; r₀ = a₀
c)
E₀ = -13.6 eV; r₀ = a₀/2
d)
E₀ = -13.6 eV; r₀ = a₀
Q) Sex organs of Riccia are _____. A) borne laterally B) projecting C) embedded D) occur in receptacles?
Kaviya Lakshmi answered • 16 hours agoRiccia belongs to the genus liverworts. The gametophytic plant body of Riccia is a branched dorsiventral thallus. The sex organs antheridia and archegonia are embedded in the thallus. The antheridium is embedded in an antheridial chamber that opens on the dorsal side of the thallus. The archegonium is linked to the thallus by a stalk. Thus the correct answer is option C.
Radio wave diffract around building although light waves do not. The reason is that radio waves:- a)travel with speed larger than c
- b)have much larger wavelength than light
- c)carry news
- d)are not electromagnetic waves.
Correct answer is option 'B'. Can you explain this answer?
Radio wave diffract around building although light waves do not. The reason is that radio waves:
a)
travel with speed larger than c
b)
have much larger wavelength than light
c)
carry news
d)
are not electromagnetic waves.
Assiduous Student answered • 18 hours agoBoth radio and light waves are EM waves, just in different frequency ranges. The wavelength of visible light is typically around the 600 nm range, which is 6/1000 of a millimeter (very small!). Radio waves on the other hand, often wave wavelengths of a few yards long. For a wave to diffract around an object, the size of the object must be on the same order of the wavelength of the wave.hence, opti... more
Locomotory organ of annelida is- a)Sucker
- b)Satae
- c)Parapodia
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Locomotory organ of annelida is
a)
Sucker
b)
Satae
c)
Parapodia
d)
All of the above
Addala Srilakshmi answered • 18 hours agoSuckers are used by leeches,setae are used by earthworm and parapodia are used by nereis.
Ribosome of mitochondria, chloroplast and eukaryotic cytoplasm are respectively: (a) 80S, 70S, 70S (c) 70S, 70S, 80S (b) 80S, 80S, 8OS (d) 705, 80S, 70S?
Addala Srilakshmi answered • 19 hours agoMitochondrial ribosomes-70s.chloroplast ribosomes-70s. eukaryotic cytoplasm-80s.prokaryotic cytoplasm-70s
Bicollateral condition is found in- a)root
- b)stem
- c)leaf
- d)seed
Correct answer is option 'B'. Can you explain this answer?
Bicollateral condition is found in
a)
root
b)
stem
c)
leaf
d)
seed
Addala Srilakshmi answered • 19 hours agoBicollateral condition is found in cucurbitaceae stems.
The undesirable sounds, which disturb our environment, are called- a)air pollution
- b)noise pollution
- c)soil pollution
- d)nuclear pollution
Correct answer is option 'B'. Can you explain this answer?
The undesirable sounds, which disturb our environment, are called
a)
air pollution
b)
noise pollution
c)
soil pollution
d)
nuclear pollution
Assiduous Student answered • 19 hours agoNoise pollution is considered to be any unwanted or disturbing sound that affects the health and well-being of humans and other organisms. .. option B is right ans
Why was the crofter so talkative and friendly with the peddler though he was a stranger?
1153 Gayatri Bansode answered • 20 hours agoThe crofter was old man without wife and child, he was happy to get someone to talk in his lonlyness, to be relieved of his boredom and monotony. This is the reason he was so talkative and friendly with peddler
How many bone of a new born baby?
Jayendra Munipalli answered • 20 hours agoA new born human baby has 300 bones which eventually in due course of time fuse together to form 206 bones in adult age
The salt which is least likely to be found in mineral is- a)Chloride
- b)Sulphate
- c)Sulphide
- d)Nitrate
Correct answer is option 'D'. Can you explain this answer?
The salt which is least likely to be found in mineral is
a)
Chloride
b)
Sulphate
c)
Sulphide
d)
Nitrate
1153 Gayatri Bansode answered • 20 hours agoBecause Nitrate is highly present in minerals, it's highly probable to find out in any mineral.
ICBN stands for [2007]- a)International Code of Botanical Nomenclature
- b)International congress of Biological Names
- c)Indian Code of Botanical Nomenclature
- d)Indian Congress of Biological Names.
Correct answer is option 'A'. Can you explain this answer?
ICBN stands for [2007]
a)
International Code of Botanical Nomenclature
b)
International congress of Biological Names
c)
Indian Code of Botanical Nomenclature
d)
Indian Congress of Biological Names.
Assiduous Student answered • 21 hours agoThe International Code of Botanical Nomenclature (ICBN) is a set of rules and recommendations dealing with the formal botanical names given to plant.
more
Which compound would you use to resolve a racemic mixture of carboxylic acid?
1153 Gayatri Bansode answered • 21 hours agoSodium benzoate is widely used for resolving racemic mixtures..
Mineral is component of nitrogenase and nitrate reductase both-- a)Fe
- b)Mo
- c)Mn
- d)Ca
Correct answer is option 'B'. Can you explain this answer?
Mineral is component of nitrogenase and nitrate reductase both-
a)
Fe
b)
Mo
c)
Mn
d)
Ca
Assiduous Student answered • 21 hours agoMo is required in the synthesis of nitrogenase and nitrate reductase and is present in the form of molybdoflavoprotein in these enzymes. These enzymes are crucial for fixing atmospheric nitrogen to the usable forms in plants.
Hence, B is the correct answer.
Hence, B is the correct answer.
What is the wavelength of the electron moving in the third orbit of lithium 2 + ion
Prateek Tomar answered • 21 hours agoWave length = 3.32 Å
If a curved black body utensil is heated to high temperature and then brought in dark then?
Prateek Tomar answered • 21 hours agoBlack body emitting the heat/energy , because a good absorber is also a good emitter
A ship A is moving westwards with a speed of 10 kilometre per hour and a ship B video hundred kilometres south of a is moving northwards with a speed of 10 kilometre per hour the time after which the distance become them shor... more
Prateek Tomar answered • 21 hours agoAfter 5 hr , distance between A & B is minimum
Amarnath Amar asked • 15 hours agoA : A charged particle is moving from origin in the region in which uniform magnetic field exists in zdirection and a uniform electric filed in y-direction. At a point p(x, y, z) speed of the particle is v. then v will depend on y only.R : In combined electric field and magnetic fields work is done by electric field only.- a)If both Assertion & Reason are true and the Reason is the correct explanation of the Assertion.
- b)If both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion.
- c)If Assertion is true statement but Reason is false.
- d)If Assertion is false statement but Reason is true
Correct answer is option 'A'. Can you explain this answer?
A : A charged particle is moving from origin in the region in which uniform magnetic field exists in zdirection and a uniform electric filed in y-direction. At a point p(x, y, z) speed of the particle is v. then v will depend on y only.
R : In combined electric field and magnetic fields work is done by electric field only.
a)
If both Assertion & Reason are true and the Reason is the correct explanation of the Assertion.
b)
If both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion.
c)
If Assertion is true statement but Reason is false.
d)
If Assertion is false statement but Reason is true
Garima Kunwar asked • 19 hours agoA hydrocarbon (A) is allowed to react with sodium amide and then with ethyl bromide to produce another hydrocarbon (B) which one ozonolysis produces propanoic acid only. The hydrocarbons (A) and (B) are, respectvely,- a)propyne and 2-pentyne
- b)1-butyne and 3-hexyne
- c)propyne and 3-hexyne
- d)1-butyen and 3-hexene
Correct answer is option 'B'. Can you explain this answer?
a)
propyne and 2-pentyne
b)
1-butyne and 3-hexyne
c)
propyne and 3-hexyne
d)
1-butyen and 3-hexene
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