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 botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects

Which one of the following is the example of unicellular organism?

  1. Snake

  2. Yeast

  3. Bird

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

The cell is the structural unit of life. Unicellular organisms are made up of one cell that performs all the functions, unlike a multicellular organism that consists of multiple cells e.g., yeast, bacteria. Thus, the correct answer is option B.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects

Amoeba is said to be a ...........organism. 

  1. Organized

  2. Multi-cellular

  3. Unicellular

  4. Well defined
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Amoeba is a unicellular eukaryote. It is made up of a single cell which carries out all functions like movement, respiration, excretion etc. 
Therefore the correct answer is option C.
Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

True nucleus is absent in

  1. Green algae

  2. Fungi

  3. Lichens

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

Bacteria are prokaryotes grouped in Kingdom Monera. Prokaryotes have a pro or primitive karyon. Thus the true nucleus is absent in bacteria. The chromosome, a single, continuous strand of DNA, is localized, but not contained, in a region of the cell called the nucleoid. All the other cellular components are scattered throughout the cytoplasm.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Which of the following is common features of Amoeba?

  1. Pseudopodia, food vacuole, phagocytosis, assimilation and egestion

  2. Phagocytosis, contractile vacuole, lysosome, holozoic and ingestion

  3. Contractile vacuole, absorption of food, egestion and grinding of food particles

  4. Pseudopodia, ciliary movement, contractile vacuole and phagocytosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An Amoeba is a type of organism belongs to kingdom Protista. They have the ability to alter its shape, primarily by extending and retracting pseudopods. Amoeba has contractile vacuole which expels excess water from the cell. The various processes which are involved in the nutrition of Amoeba are:
Ingestion, digestion, absorption, assimilation and egestion. Amoeba has not excretory organs. The undigested food collects inside the Amoeba is thrown out of the body by the cell membrane. Thus, the correct answer is option A.

Multiple choice botany the world of microbes bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Muramic acid is present in cell walls of

  1. Bacteria

  2. Green algae

  3. Yeast

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

The cell walls of bacteria are composed of a macromolecule peptidoglycan which is a repeating framework of long glycan chains having alternate N-acetyl glucosamine and N-acetyl muramic acid; these glycan chains are cross-linked by short peptide fragments to provide a strong but flexible support framework. This makes option A correct. The green algal cell wall is composed mainly of cellulose which makes option B incorrect. Chitin is common constituent of cell walls of all type of fungi; option C is incorrect. The yeast cell wall itself is mainly composed of glucans ($\beta$$-glucans), mannoproteins and chitin; option D is incorrect. Thus, the correct answer is option A.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

What are the major groups of microorganisms?

  1. Bacteria, fungi

  2. Protozoa, algae

  3. Bacteria, fungi, protozoa, algae and virus.

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

Microorganisms are the organisms that we cannot see by our naked eyes. It can be prokaryotic unicellular like bacteria, eukaryotic unicellular like protozoa, eukaryotic multicellular like fungi and algae and even acellular like viruses.

Thus, the correct answer is option C.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Unicellular organisms are capable of (i) Independent existence (ii) Performing the essential functions of life

  1. Only I

  2. Only II

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Unicellular organisms are made up of a single cell and perform all the life processes for survival and independent existence.  Hence, the cell is called as the fundamental structural and functional unit of life.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Histological differentiation is absent in ____________.

  1. Amoeba

  2. Hydra

  3. Cockroach

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

Amoeba is a unicellular organism; therefore, it lacks the complex histological differentiation found in multicellular organisms like Hydra, cockroaches, or earthworms.

Multiple choice botany the world of microbes bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Teichoic acid is present in cell wall of

  1. Bacteriophage

  2. Mycoplasma

  3. Nostoc

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

Teichoic acids are characteristic components of the cell wall of Gram-positive bacteria. Pneumococcus is a well-known Gram-positive bacterium, whereas the others listed do not possess this specific cell wall structure.

Multiple choice botany the world of microbes bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Select the wrong statement of a bacterial cell

  1. Mesosome is formed by extensions of plasma membrane into cell

  2. Pili are elongated tubular structures made up of a protein

  3. Flagellum is composed of filament, hook and basal body

  4. Ribosomes are about 30 nm by 50 nm in size

  5. Fimbriae are small bristle like fibres sprouting out of cell.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Bacterial ribosomes are 70S, consisting of 30S and 50S subunits. The statement claiming they are 30 nm by 50 nm is incorrect as these numbers refer to the Svedberg units of the subunits, not the physical dimensions in nanometers.