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

Segmented worms are known as

  1. Nematods

  2. Pianarians

  3. Annelids

  4. Arthropods

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Segmented worms are called annelids. They are characterized by body segmentation (repeated similar units), which distinguishes them from roundworms (nematodes) and flatworms (planarians - misspelled here). Arthropods also have segmentation but are distinguished by jointed appendages and chitinous exoskeletons.

Multiple choice

The canal system is a characteristic feature of

  1. echinoderms

  2. sponges

  3. coelenterates

  4. mollusks

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

All the cavities in a sponge's body are intercommunicating and are collectively referred to as the canal system. Thus, the canal system helps the sponge in nutrition, respiration and excretion.

Multiple choice

Which kingdom organisms exhibit two body forms?

  1. Cnidaria

  2. Platyhelminthes

  3. Mollusca

  4. Echinodermata

  5. Arthropoda
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Polyp and medusa - names for the two body forms, one non motile and one typically free swimming, found in the aquatic invertebrate phylum cnidaria.

Multiple choice

Which of the following twins is asymmetrically conjoined?

  1. Parasitic twins

  2. Craniopagus

  3. Cephalothoracopagus

  4. Pygopagus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Here in this type of twins,  the twins are asymmetrically conjoined leading in the formation of one twin, i.e. small, less formed, and dependent on the bigger one for survival.

Multiple choice

Which of the following sentences is false?

  1. The Caribbean chicken-liver sponge Chondrilla nucula is responsible for bio-erosion.

  2. Sponge flies are specialist predators of freshwater sponges.

  3. Cyanobacterium causes rust-coloured bands in Aplysina red band syndrome.

  4. Glass sponges produce highly toxic chemicals for defence.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

It is untrue, glass sponges do not secrete toxic chemicals for defence.