Biology · Science General

Diversity in Living Organisms

3,323 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

Directions: Vicky was playing volleyball in the ground with his friends. One of his friend, Himesh who was standing near the boundary felt something climbing upon his feet. Subsequently he started crying in pain. Vicky being a class IX student identified the climbing creature as leech and helped in removing the leech.

To which of the following phylum does leech belong?

  1. Phylum Arthropoda

  2. Phylum Platyhelminthes

  3. Phylum Annelida

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

Leeches belong to the Phylum Annelida, which consists of segmented worms. Arthropoda includes insects and crustaceans, Platyhelminthes are flatworms, and Echinodermata includes starfish and sea urchins.

Multiple choice

Which of the following statements is not true for euglena?

  1. Euglena divides horizontally.

  2. Euglena possesses a red eyespot.

  3. Euglena lacks a cell wall.

  4. Euglena can form a protective wall around itself during unfavourable conditions.

  5. Euglena's chloroplasts are surrounded by three membranes.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Euglena reproduces asexually through binary fission. 

Multiple choice

The protozoa commonly known as giant amoeba is

  1. acanthamoeba

  2. amoeba

  3. balamuthia

  4. chaos

  5. clydonella
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chaos is a genus of amoebae in the family Amoebidae. The largest and best known species, the so-called giant amoeba Chaos carolinense, can reach upto a length of 5 mm.

Multiple choice

The dictyostelids are commonly known as social amoebae. Which of the following statements does not characterise dictyostelids?

  1. They form pseudoplasmodium if the food supply is inadequate.

  2. The slug is capable of responding to light and temperature gradients.

  3. Dictyostelium is an interesting example of the evolution of cooperation and cheating.

  4. Only the heterothallic strains of dictostelium can undergo mating.

  5. Mating is initiated by gametogenesis.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sexual development can occur when amoeboid cells are starved for their bacterial food supply and dark humid conditions are present. 

Multiple choice

Which of the following statements regarding Entamoeba is FALSE?

  1. Multi nucleated trophozoites convert into cysts in a process called encystation.

  2. Entamoeba belongs to Archamoebae.

  3. The trophozoites of Entamoeba feed primarily on bacteria.

  4. Entamoeba coli is harmless.

  5. All Entamoeba species are found in the intestines of the animals that they infect.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Uni-nucleated trophozoites convert into cysts in a process called encystation. 

Multiple choice

Presence of notochord, dorsal tubular nerve cord and pharyngeal slits are the three important characters of phylum Chordata. In which of the following chordates are all the three characters present in the adult form?

  1. Doliolum

  2. Oikopleura

  3. Branchiostoma

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

 Presence of notochord, dorsal tubular nerve cord and pharyngeal slits are the three important characters of phylum Chordata. In Branchiostoma, all the three characters are present in the adult form.