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Medical
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Which one of the following statements about certain given animals is correct?

  • Option 1)

    Round worms (Aschelminthes) pseuocoelomates

  • Option 2)

    Molluscs are acoelomates

  • Option 3)

    Insects are pseudocoelomates

  • Option 4)

    Flat worms (Platyhelminthes) are coelomates

 
  Phylum Aschelminthes (roundworm) - Body is circular in cross-section. They are free-living, aquatic and terrestrial or parasitic. Bilateral symmetry, triploblastic and pseudocoelomates. - wherein Eg. Ascaris, Wucheria, Ancylostoma.     Pseudocoelomates - Body cavity is not lined by mesoderm, instead, they are present as scattered pouches between ectoderm and endoderm. - wherein Eg....
Medical
110 Views   |  

One example of animals having a single opening to the outside that serves both as mouth as well as anus is:

  • Option 1)

    Octopus

  • Option 2)

    Asterias

  • Option 3)

    Ascidia

  • Option 4)

    Fasciola

 
  Phylum Platyhelminthes (Flat Worms) - Free living, commensal or parasite with dorsoventrally flattened body, bilaterally symmetrical, triploblastic and acoelomate. - wherein Eg. Taenia, Fasciola    Fasclola (Platyhelminthea) has single opening for both ingestion and excretion Option 1) Octopus This is incorrect option Option 2) Asterias This is incorrect option Option 3) Ascidia This is...
Medical
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Which one of the following kinds of animals are triploblastic?

  • Option 1)

    Flat worms

  • Option 2)

    sponges

  • Option 3)

    Ctenophores

  • Option 4)

    Corals

 
  Phylum Platyhelminthes (Flat Worms) - Free living, commensal or parasite with dorsoventrally flattened body, bilaterally symmetrical, triploblastic and acoelomate. - wherein Eg. Taenia, Fasciola     Option 1) Flat worms This is correct option Option 2) sponges This is incorrect option Option 3) Ctenophores This is incorrect option Option 4) Corals This is incorrect option
Medical
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Male and female gametophytes are independent and free-living in:

  • Option 1)

    Mustard 

  • Option 2)

    Castor 

  • Option 3)

    Pinus 

  • Option 4)

    Sphagnum

 
  Bryopsida / Mosses - Gamatophytic plant body is thalloid protonema and leafy with obliquely septate rhizoids and elaters absent in sporophytic stage. - wherein Eg. Sphagnum, Funaria     Haplo-diplontic life cycle - Sporophyte and gametophyte both are photosynthetic and free living. - wherein Eg  All bryophytes and pteridophytes some brown algae (Laminaria). Ectocarpus, some green algae (ulva...
Medical
109 Views   |  

Some hyperthermophilic organisms that grow in highly acidic (PH2) habitats belong to the two groups:

  • Option 1)

    Eubacteria and archaea

  • Option 2)

    Cyanobacteria and diatoms 

  • Option 3)

    Protists and mosses 

  • Option 4)

    Liverworts and yeasts 

 
  Thermoacidophiles - Chemosynthetic Aerobes or anaerobes Gram negative bacteria They oxidised or reduced sulphur Grow in high temperature and high acidic condition (pH 1 – 4)and found in hot sulphur springs. - wherein Eg. Thermo plasma, thermo protein.     Archaebacteria - Live in harsh habitats. Cell walls lack muramic acid and peptidoglycan. Branched lipids having Phytanyl side groups...
Medical
135 Views   |  

Algae have cell wall made up of:

  • Option 1)

    cellulose, galactans and mannans 

  • Option 2)

    hemicellulose, pectins and proteins 

  • Option 3)

    pectins, cellulose and proteins 

  • Option 4)

    cellulose, hemicellulose and pectins 

 

option 1. cellulose galactans and mannans and also composed of pectin

 

Medical
87 Views   |  

Virus envelope is known as:

  • Option 1)

    Capsid

  • Option 2)

    Virion

  • Option 3)

    Nucleoprotein 

  • Option 4)

    Core

 
As learnt in Composition of virus - Envelope - Outer loose covering with peplomer proteins. Capsid - Protein covering around the genetic material made of capsomeres. Nucleoid - Either DNA or RNA. -    Virus envelope is known as Capsid. Option 1) Capsid This option is correct. Option 2) Virion This option is incorrect. Option 3) Nucleoprotein  This option is incorrect. Option 4) Core This...
Medical
95 Views   |  

Membrane-bound organelles are absent in:

  • Option 1)

    Saccharomyces

  • Option 2)

    Streptococcus

  • Option 3)

    Chlamydomonas

  • Option 4)

    Plasmodium

 
As learnt in Coccus Bacteria - About spherical and always non flagellate. - wherein Micrococcus, Diplococcus, Streptococuus etc.    Membrane bound organelles are absent in prokaryotes (bacteria). Option 1) Saccharomyces This option is incorrect. Option 2) Streptococcus This option is correct. Option 3) Chlamydomonas This option is incorrect. Option 4) Plasmodium This option is incorrect.
Medical
86 Views   |  

Single-celled eukaryotes are included in:

  • Option 1)

    Protista 

  • Option 2)

    Fungi 

  • Option 3)

    Archaea 

  • Option 4)

    Monera 

 
As learnt in Kingdom Protista - Unicellular eukaryotic. Mostly aquatic. Well define nucleus present Various membrane bound organelles present Flagella and cilia, if present have (9+2) pattern of micro tubular stands. Reproduction is asexual and sexual. Autotrophic, parasitic and heterotrophic. - wherein Classified into three type Photosynthetic protists Consumer decomposer protists...
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