Self Studies
Self Studies
Self Studies
Self Studies

Biological Classification Test - 59

Result Self Studies

Biological Classification Test - 59
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Lichen with a branched system but small base is :
    Solution
    Lichens with a branched system but small base are Fruticose.

    Lichens are a complex life form of a symbiotic partnership of two separate organisms, a fungus, and algae. The dominant among then is a fungus. The algae can be either green algae or cyanobacteria or both fungus. 

    These are $$3$$ main types of lichens. Foliose, Fructose, and Crustose. Foliose lichens have $$2$$ easily distinguishable sides, top, and bottom. Fruticose lichens have round branches that have a central core and others are hollow in the middle. 
  • Question 2
    1 / -0
    Sexual reproduction with undifferentiated sex organs or vegetative cells is _____________.
    Solution
    Somatogamy is the fusion of two somatic hyphae acting as gametes for two sexually compatible mycelia. This is the most reduced form of sexual reproduction. 
    So the correct answer is option D.
  • Question 3
    1 / -0
    Lichens have an actual relationship of 
    Solution
    In lichens, a relationship occurs in which the fungus lives as a dominant organism and algae like a slave, the relationship is known as helotism. It is a form of symbiosis in which one species is forced to perform tasks for another, for their mutual benefit. 
    Thus, the correct answer is option C.
  • Question 4
    1 / -0
    Which one among the following is a non pathogenic bacterium, present in colon?
    Solution
    Escherichia coli are Gram-negative, facultative aerobic bacteria. They are common inhabitant of human colon. These strains of E. coli are harmless or non pathogenic. They form the part of the normal microbiota of the intestine. They live in symbiotic association. They benefit hosts by producing vitamin K$$_2$$ and preventing colonization of the intestine with pathogenic bacteria.
    Thus, the correct answer is 'Escherichia coli.'
  • Question 5
    1 / -0
    Organisms which obtain energy by oxidation of reduced inorganic compounds are
    Solution
    Chemotrophs are those bacteria which depends on sunlight directly (chemoautotrophs) or indirectly (chemoheterotrophs) for their food. Chemoheterotrophs use inorganic molecules as a source of energy and convert into organic substances. They obtain energy by oxidation of reduced inorganic substances. They are unable to utilize carbon dioxide to form their own organic compounds.
    Thus, the correct answer is 'Chemoheterotrophs.'
  • Question 6
    1 / -0
    Which one is not correctly matched?
    Solution
    Antibiotic is an antibacterial compound used in the treatment of bacterial infection. It is extracted from the bacteria. Streptomyces is a Gram-positive bacteria which produces many antibiotics like Streptomycin, neomycin, grisemycin, chloramphenicol. Serratia causes urinary tract infections, wound infections, pneumonia. It causes endocarditis. It is associated with the intravenous drug addiction. Rhizobium is a symbiotic nitrogen fixing bacteria. It fixes atmospheric nitrogen in association with the legume plants. Hence, it acts as biofertilizer. Single cell protein (SCP) are edible unicellular organisms. Spirulina is the source of single cell protein.
    Thus, the correct answer is 'Serratia - Drug addiction.'
  • Question 7
    1 / -0
    Lichens multiply by 
    Solution
    Lichens reproduce vegetatively by soredia formation. It is the most common form of reproduction where small protuberances are formed on the thallus. They may have a definite pustule or appear as greyish dust. Many lichens reproduce asexually, either by vegetative reproduction or through dispersal of diaspores, which contain a few algal cells surrounded by fungal cells. 
    Thus, the correct answer is option D.
  • Question 8
    1 / -0
    In peritrichous bacteria, flagella occur
    Solution
    There are four types of flagellar arrangements based on the number and placement of flagella on the cell. These are, 
    1. Monotrichous - A single flagellum extends from one end of the cell.
    2. Amphitrichous - A single flagellum or multiple flagella extend from two ends of the cell.
    3. Lophotrichous - Tuft of flagella extend from one end or both ends of the cell.
    4.  Peritrichous - Multiple flagella randomly distributed all over the bacterial cell.
    Thus, the correct answer is 'All over the body.'

  • Question 9
    1 / -0
    Some protists possess structures for regulation of their water content. They are
    Solution
    The contractile vacuole is a specialized type of vacuole that regulates the quantity of water inside a cell. In freshwater environments, the concentration of solutes is hypotonic, lesser outside than inside the cell. Under these conditions, osmosis causes water to accumulate in the cell from the external environment. It is found predominantly in protists and in unicellular algae.
    So the correct answer is option B.
  • Question 10
    1 / -0
    Escherichia coli is abundantly found in
    Solution
    Escherichia coli are Gram-negative, facultative aerobic bacteria. They are abundantly found in human intestines. These strains of E. coli are harmless. They form the part of the normal microbiota of the colon. They live in symbiotic association. They are called as commensals. They benefit hosts by producing vitamin K$$_2$$ and preventing colonization of the intestine with pathogenic bacteria.
    Thus, the correct answer is 'Human intestine.'
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now