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

Which of the following is not a characteristic of organisms of phylum Protozoa of kingdom Protista?

  1. The organisms are unicellular and mostly aquatic.

  2. The organisms reproduce asexually and sexually.

  3. The organisms have their body naked or covered by pellicle or hard shells.

  4. The locomotion of these organisms is by using finger-like pseudopodia, flagella or cilia.

  5. Body is only long, coil-shaped.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Their body shape may be irregular, spherical, oval, elongated or flattened.

Multiple choice

Which of the following eukaryotic organisms has been proven to be of great industrial importance?

  1. Penicillium chrysogenum

  2. Bacillus subtilis

  3. Saccharomyces cerevisiae

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

Saccharomyces cerevisiae (baker's yeast) is a eukaryotic microorganism with immense industrial importance in baking (bread leavening), brewing (beer and wine production), and bioethanol production. Penicillium chrysogenum (option A) is also eukaryotic and industrially important but the question specifically notes Saccharomyces. Bacillus subtilis (option B) and Streptomyces griseus (option D, misspelled) are prokaryotic bacteria, not eukaryotes.

Multiple choice

Enzymes are absent in

  1. algae

  2. fungi

  3. bacteria

  4. lactic acid bacteria

  5. virus
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

No enzymes are found in the virus as these are inert particles. These exist as a connecting link between living and non living kingdom.

Multiple choice

Consider the following statements:

  1. Except mammals and reptiles, no other animal group has the unique arrangement of three bones in the middle ear.
  2. Mammals are osmoregulators (maintain the pressure of body fluids).

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect. Only mammals have the unique arrangement of three bones in the middle ear. Statement 2 is correct. Mammals are osmoregulators, i.e. they maintain the percentage of salts and water in their body.

Multiple choice

Which of the following is/are the characteristic(s) of mammals?

  1. Homodont dentition
  2. Three auditory ossicles
  3. Four chambered heart
  4. Attached placenta

  1. Only 3

  2. Only 1 and 3

  3. Only 2, 3 and 4

  4. Only 2 and 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mammals have the following characteristics:

  1. Heterodont dentation (different kinds of teeth like incisors, molars, premolars and canines)
  2. Three auditory ossicles (malleus, incus and stapes)
  3. Four chambered heart (two auricles and two ventricles)
  4. Attached placenta (The placenta is attached to the wall of the uterus by blood vessels that supply the fetus with oxygen and nutrition and remove waste from it.)