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

In which of the following organisms, mitochondria are absent?

  1. Green algae

  2. Fungi

  3. Blue green algae

  4. Angiosperms

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Blue-green algae (cyanobacteria) are prokaryotes and lack membrane-bound organelles like mitochondria. Green algae, fungi, and angiosperms are all eukaryotes possessing mitochondria for cellular respiration.

Multiple choice

What types of microorganisms are bacteriophage?

  1. Bacteria that attack plants

  2. Virus that attack insects

  3. Virus that attack bacteria

  4. Bacteria that attack insects
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bacteriophages are viruses that specifically infect and replicate within bacteria. The word literally means 'bacteria-eater'. They are not bacteria themselves, and they target bacterial cells, not plants or insects.

Multiple choice

Which of the following organisms is multicellulose?

  1. Chlamydomonas

  2. Chlorella

  3. Cyanobacteria

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

Spirogyra is a filamentous green alga that is multicellular, consisting of chains of cylindrical cells arranged in a filament. Chlamydomonas and Chlorella are unicellular green algae, while cyanobacteria (though they can form colonies) are fundamentally unicellular prokaryotes.

Multiple choice

Mycoplasma is another class of micro-organisms that resemble in many respects to which of the following organism?

  1. Bacteria

  2. Fungi

  3. Protozoa

  4. Virus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mycoplasma are bacteria that lack a cell wall, which is their distinguishing feature. Despite this difference, they share fundamental characteristics with bacteria: they are prokaryotic, have small cells, divide by binary fission, and are susceptible to many antibiotics that target bacterial processes. They are not viruses, fungi, or protozoa.

Multiple choice

Which of the following microorganisms moves with the help of pseudopodia?

  1. Paramecium

  2. Amoeba

  3. Euglena

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

Amoeba moves and feeds using temporary extensions of its cell membrane and cytoplasm called pseudopodia ('false feet'). Paramecium uses cilia (tiny hair-like structures) for movement, Euglena uses a flagellum (whip-like tail), and 'Algal' is not a specific organism.

Multiple choice

Which of the following statements is true for both, Bacilli and Honey Bee?

  1. They both have DNA as their genetic material

  2. They both have lysosome

  3. Both have ribosome and genetic information inherited by DNA

  4. Both have defined nuclear membrane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both bacilli (bacteria) and honey bees (eukaryotes) possess ribosomes for protein synthesis and use DNA as their genetic material that is inherited. While bacteria lack membrane-bound organelles like lysosomes and a defined nuclear membrane, they share ribosomes and DNA-based genetics with all living organisms.

Multiple choice

Which of the following group of organisms are prokaryotic?

  1. Green algae, brown algae, red algae

  2. Yeasts and other fungi

  3. Mycoplasma, bacteria and cynobacteria

  4. Bacteria, yeast and virus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mycoplasma, bacteria, and cyanobacteria are all prokaryotic organisms - they lack a true nucleus and membrane-bound organelles. Algae and fungi are eukaryotic. Viruses are not considered living organisms and are neither prokaryotic nor eukaryotic. Note: 'cynobacteria' should be spelled 'cyanobacteria'.

Multiple choice

Why are algae considered as plants?

  1. Chlorophyll is present.

  2. They have vegetative propagation.

  3. Cell wall is present.

  4. They are autotrophs.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Algae are considered as plants because they are autotrophs and synthesise their own food in the presence of sunlight.