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Yatharth Kumar
2 years ago | Botany | Biological Classification
  • Bacterial life process

    What is the difference between obligate aerobe and facultative aerobe?

    why facultative aerobe comes under anaerobic respiration in bacteria?

Shraddha
2 years ago
Vidyashree
2 years ago | Botany | Biological Classification
  • Where is the description About eubacteria in video?

  • Reference Video
Shraddha
2 years ago
  • Please mention the video number and the time duration where you are facing the problem 

Vidyashree
2 years ago | Botany | Biological Classification
  • Does reproduction included in the criterion of five kingdom system ? If yes then why?

     

  • Reference Video
Shraddha
2 years ago
  • Yes it is definitely included because it is must for evolution of species . The main criteria for five kingdom system of classification are :-
    1) Complexity of cell structure
    2) Complexity of organism's body 
    3) Life cycle and phylogenetic relationship
    4) Mode of obtaining nutrition
    5) Reproduction 

Nabeela Hameed
a year ago | Botany | Biological Classification
  • Vertical transmission of viruses in human is through placenta only... Plz explain.

NEETprep
a year ago
  • Can you please let us know the video number where this is told? Or is this coming from some other reference book?

Nabeela Hameed
a year ago | Botany | Biological Classification
  • 1) From a single cyst of Entamoeba, the number of young ones which hatch out are-

    a) 8     b)6     c)4     d)2

     

    2) How many young amoebae hatch out from a single cyst of entamoeba histolytica-

    a) one     b)two     c)four     d)six

     

    3) Encysted, non-motile 7 non feeding infectious stage of Entamoeba histolytica is formed by-

    a)schizont     b)zygote     c)minute form     d)abiotic form

    Plz ans these questions...

    Without reading the life cycle of Entamoeba, cannot solve this type of ques. So is it necessary to read life cycle of it??? plzz tell about it..

NEETprep
a year ago
  • Please don't focus on anything beyond what is in NCERT books and videos provided by us. For your other questions as well, if it not covered in NCERT books and in our videos, you shouldn't be wasting time with that. Which reference book has these above questions?

Alisha
a year ago | Botany | Biological Classification
  • because of being bluish purple crystal voilet is called gram stain??

  • Reference Video
NEETprep
a year ago
  • The whole process is called "Gram Stain". Ignore the incorrect language used there. 

Alisha
a year ago | Botany | Biological Classification
  • visualise mean ?

    why there a need to use saffranin

    because gram + to coloured h to dikh hi jayenge but jo bacteria nhi dikh rhe h gram- unhe dekhne k liye saffranine use krenge    kya m thk soch rhi hu

    kya saffranine ka gram + pr koi effect hoga??

  • Reference Video
NEETprep
a year ago
  • There are three possibilities in the beginning: 

    i) Gram positive bacteria is present. 

    ii) Gram negative bacteria is present.

    iii) No bacteria is present.

    there are still two possibilities remaining in "without stain" case after ruling out "Gram positive" bacteria.  

    1) Gram negative bacteria is present.

    2) No bacteria is present.

    That's why Safranin is used to rule out case 2) 

    Actually both Gram-positive bacteria and Gram-negative bacteria pick up the Safranin, which results in pink colour. Pink colour, however, is unseen on Gram-positive bacteria because of the darker crystal violet stain.

    See wikipedia image below for reference:  

Alisha
a year ago | Botany | Biological Classification
  • koi aur nhi kr sakta.

    sir koi aur other bacteria ko kh rhe h ya phir koi bhi organism except blue green algae??

  • Reference Video
NEETprep
a year ago
  • "Koi aur bhi organism" for both the functionalities of blue green algae which make it "Metabolically most independent organism". There are other organisms which can do either of those functionalities but can't do both. 

Alisha
a year ago | Botany | Biological Classification
  • meiosis kaise ho sakta h fruiting body to haploid h na??

  • Reference Video
NEETprep
a year ago
  • As told by J K Mishra sir: 

    Meiosis occurs in both cases. 

    In acellular slime mould plasmodium is diploid structure and frutification takes place during unfavorable condition and meiosis takes place to produce haploid spore. 

    In cellular slime mould central myxamoebae engulfs surrounding myxamoebae and nucleus of one fuses with central one and then meiosis takes place in diploid structure to form haploid spores. 

Alisha
a year ago | Botany | Biological Classification
  • sir bta rhe h ki.. zygospore tb banega jb progametangia fuse karenge and there are lot of nuclei in the gametangia...but NCERT m diya h  zygospore is formed by the fusion of two gametes and these gametes may be isogamous,anisogamous,oogamous  to kya NCERT m galat diya h ??

    plz clear the sentence given in NCERT ..plz

  • Reference Video
NEETprep
a year ago
  • There is nothing wrong with both versions. Progametangia turns into gametangium and subsequently a gamete, which fuses to form zygospore.