Biology · Science General

Diversity in Living Organisms

3,829 Questions

The diversity in living organisms deals with the classification of life forms into various kingdoms and phyla. This topic covers specific traits of bacteria, animal body cavities, and structural adaptations for survival. These fundamentals are crucial for biology sections in medical entrance and state board exams.

Animal phyla characteristicsBacteria and flagellaBiological adaptationsKingdom Animalia classificationBody cavity typesExtinct organism subphylaJawless animals identification

Diversity in Living Organisms Questions

Multiple choice

Which of the following sets contain only fruiting myxobacteria?

  1. Melittangium, Polyangium, Cystobacter

  2. Flexibacter, Sporocytophaga, Cytophyga

  3. Melittangium, Sporocytophaga, Flexibacter

  4. Cystobacter, Polyangium, Cytophyga

  5. Flexibacter, Sporocytophaga, Cystobacter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cystobacter, Melittangium, Polyangium : All are fruiting myxobacteria.

Multiple choice

Which of the following sets of protozoans contain only endoparasites?

  1. Paramecium, Trypanosoma, Balantidium

  2. Paramecium, Proterospongia, Balantidium

  3. Giardia, Trypanosoma, Balantidium

  4. Proterospongia, Trypanosoma, Giardia

  5. Paramecium, Proterospongia, Giardia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Balantidium, Giardia, Trypanosoma: All are internal parasite protozoans. Balantidium is a common intestinal parasite of vertebrates found chiefly in amphibians and mammals. Giardia is found as parasite in the digestive tract of vertebrates. Trypanosoma is an endoparasite, which resides in blood and cerebrospinal fluid of man.

Multiple choice

Which of the following statements about prokaryotic extracellular appendages are correct?

  1. Bacterial glycocalyx is located inside the cell wall.
  2. Bacterial capsule is a well organized bacterial glycocalyx.
  3. F pili involve in transfer DNA one bacterium to another.
  4. Fimbriae help bacteria to attach to the other structures.

  1. Only 1 and 2

  2. Only 1 and 3

  3. Only 2 and 3

  4. Only 2 and 4

  5. Only 2, 3 and 4
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Bacterial capsule is a well organised bacterial glycocalyx that is firmly attached to the bacterial cell wall. F (conjugation, sex) pili are involved in the transfer of plasmids from one bacteria to the other. Fimbriae are short pili found in large numbers and used to attach bacteria to surfaces.

Multiple choice

Full neotany is observed in

  1. Rana clamitans

  2. Ambystoma tigrinum

  3. Chiroxiphia linearis

  4. Chiroxiphia caudata
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Full neotany is seen in Ambystoma tigrinum (salamander). They become sexually mature in their larval form and retain lot of larval characteristics in the adult form.

Multiple choice

Which of these bats use echo-location for the purpose of food and prey?

  1. Megachiroptera sub-order species i.e. frugivorous bats.

  2. Both micro and megabats.

  3. Only microbats e.g. Desmodus, Rhinolophus, Myotis etc.

  4. Bats do not echolocate.

  5. Pteropus, Desmodus and Vespertilio.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Correct answer. Small / micro bats use echo-location for their food, prey and survival. Flying mammals belong to order Chiroptera, where forelimbs are modified into wings to help them fly. Flying mammals mainly include bats belonging to two sub-orders-frugivorous, large bats (Pteropus, Cynopterus) are placed in sub-order Megachiroptera while Microchiroptera include insectivorous little bats (Myotis, Rhinolophus, Vespertilio and Desmodus). The microbats use echo-location to detect their surroundings, prey, path etc.

Multiple choice

Name the phylum to which the largest animals that swim by means of cilia belong to.

  1. Echinodermata

  2. Ctenophora

  3. Coelenterata

  4. Hemichordata

  5. Porifera
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct. Ctenophorans use ciliary comb plates for locomotion. Ctenophora is a phylum of animals that live in marine waters worldwide. Their most distinctive feature is the "e;e;combs"e;e;, groups of cilia they use for swimming, and they are the largest animals that swim by means of cilia.