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 options is the characteristic feature of ‘Porifera’?

  1. Marine habitat

  2. Calcareous spicules

  3. Division of labour

  4. Canal system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Canal system is a characteristic feature of 'Porifera'.Body of all sponges is the perforated by large number of apertures through which water enters Inside body and flows through a system of criss-crossing canals collectively forming the canal system .

Multiple choice

Which of the following symmetries is possessed by roundworms?

  1. Radial

  2. Bilateral

  3. Biradial

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

 Roundworms are bilaterally symmetrical.The symmetry helps the body be streamlined, allowing the organism to move. Two organisms that have bilateral symmetry other than the roundworm are butterflies and crabs.

Multiple choice

Which of the following options is an echinoderm?

  1. Chiton

  2. Balanoglossus

  3. Antedon

  4. Scoliodon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Among these, Antedon is an echinoderm.Antedon is a genus of free-swimming, stemless crinoids. The genus first appeared in the fossil record in the Cretaceous period.

Multiple choice

Which of the following options possesses water vascular system?

  1. Arthropods

  2. Echinoderms

  3. Annelids

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

 Amon these, echinoderms possess water vascular system.The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract.

Multiple choice

Which of the following options is not a characteristic feature of echinoderms?

  1. Calcium carbonate structures

  2. Water driven tube system

  3. Acoelomic cavity

  4. Triploblastic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Echinoderms possess coelom or body cavity.Echinoderms possess a unique water vascular system. This is a network of fluid-filled canals derived from the coelom (body cavity) that function in gas exchange, feeding, sensory reception and locomotion.

Multiple choice

Which of the following is one of the fundamental characters of chordates?

  1. Presence of limbs

  2. Presence of heart

  3. Presence of nervous system

  4. Presence of haemoglobin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Presence of nervous system in the form of dorsal nerve cord is one of the fundamental characters of chordates.The dorsal nerve cord is later modified in vertebrates into the central nervous system which is composed of the brain and spinal cord. Dorsal nerve cord is mainly found in subphylum Vertebrata.

Multiple choice

What is the unique characteristic of diatoms?

  1. They do not have a cell wall.

  2. Their cell wall is made up of silica.

  3. Their cell membrane is made up of silica.

  4. Their cells lack cytoplasm.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diatoms are a kind of algae. Their cell wall is composed of silica.