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 words means 'organisms with holes'?

  1. Porifera

  2. Coelenterata

  3. Nematoda

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

Porifera – (Pori - holes) - This group includes organisms with holes. These are non-motile animals attached to some solid support under water. There have holes or ‘pores’, all over the body. These lead to a canal system that helps in circulating water throughout the body to bring in food and is helpful in respiration and removal of waste material. 

Multiple choice

The peculiar water-driven tube system is found in

  1. poriferans

  2. coelenterates

  3. echinoderms

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

Echinodermata - In Greek, ‘echinos’ means 'hedgehog' (skin is not smooth, but is rough with spines) and ‘derma’ means 'skin'. Thus, these are organisms with spines on the skin. These are free-living marine animals. They have peculiar water-driven tube system, which they use for moving around in water, capture and transport of food and respiration (exchange of gases). For example, starfish and sea urchins. 

Multiple choice

Forelimbs are modified for flight in _______.

  1. pisces

  2. reptiles

  3. amphibia

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

Aves (birds) have outside covering of feathers, and two forelimbs (either of the two front limbs of four-limbed vertebrates) are modified for flight. 

Multiple choice

Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic?

  1. The presence or absence of a rigid cell wall.

  2. Whether or not the cell is partitioned by internal membranes.

  3. The presence or absence of ribosomes.

  4. Whether or not the cell carries out cellular metabolism.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An eukaryotic cell has organelles bounded by membranes e.g. mitochondria etc. Such membrane bound organelles are entirely absent in prokaryotes.