Tag: protista

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Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Sex first originated in 

  1. Protistans

  2. Simple algae

  3. Angiosperms

  4. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(A)Protista are simple eukaryotic organisms that cannot be classified as plant, animal or fungus. They are mostly unicellular, but some are multicellular. They are first originated.

(B)Algae are group of photosynthetic organisms. They may be unicellular or multicellular. They are found in swampy areas, ponds, ditches, etc.They lack distinct organs. They were evolved after protista.
(C)Angiosperms are the vascular living plants which have true roots, stems, and leaves. They are flowering plants. Their reproductive structures are flowers.
So, the correct option is 'Both (1) and (2)'.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Single celled eukaryotes are included in Kingdom.

  1. Protista

  2. Fungi

  3. Plantae

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

A protist is any eukaryotic organism (one with cells containing a nucleus) that is not an animal, plant or fungus. The protists do not form a natural group, or clade, since they exclude certain eukaryotes; but, like algae or invertebrates, they are often grouped together for convenience. In some systems of biological classification, such as the popular five-kingdom scheme proposed by Robert Whittaker in 1969, the protists make up a kingdom called Protista, composed of "organisms which are unicellular or unicellular-colonial and which form no tissues".


So the correct option is 'Protista'.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Cell wall plates are found in cell wall of

  1. Diatoms

  2. Dinoflagellates

  3. Both (1) & (2)

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

A.Diatoms – cell wall is made up of silica and cellulose.

B.Dinoflagellates – cell wall is made up of cellulose and is present in the form of plates.

D.Euglenoids – cell wall is absent.

So, the correct option is ‘Dinoflagellates’.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Which of the following kingdoms has no well defined boundaries? 

  1. Monera

  2. Protista

  3. Fungi

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Five kingdom classification was proposed by R.H. Whittaker. According to this organisms has been divided into five kingdoms Monera, Protista, Fungi, Animalia, Plantae. Organisms are divided on the basis of different characters like cell boundary, shape, type of nutrition etc.
According to R.H. Whittaker classification-
Monera has a cell wall. It is made up of polysaccharides i.e. peptidoglycan
Fungi have a cell wall. It is made up of chitin.
Protista has no well-defined boundaries.
So, the correct answer is 'Protista'.
Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Members of Kingdom Protista are primarily 

  1. parasites

  2. terrestrial

  3. aquatic

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

All single-celled eukaryotes are placed under Protista, but the boundaries of this kingdom are not well defined. Members of Protista are primarily aquatic. This kingdom forms a link with the others dealing with plants, animals, and fungi. Being eukaryotes, the protistan cell body contains a well-defined nucleus and other membrane-bound organelles.

So the correct option is "aquatic".

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

In which kingdom will you place an organism which is unicellular, eukaryotic and photosynthetic?

  1. Kingdom Plantae

  2. Kingdom Monera

  3. Kingdom Protista

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

Protists are eukaryotic organisms that are mostly unicellular in nature. They can be mainly classified into three main categories:-

  • Animal-like protists, which are heterotrophs and has the ability to move.

  • Plant-like protists- that are autotrophs and can photosynthesize.

  • Fungi like protist- that are heterotroph and possess a cell with the cell wall.

  • Kingdom Plantae includes mainly multicellular, eukaryotic organisms that have the ability to do photosynthesis. Kingdom Monera composed of organisms that are prokaryotic and unicellular. 

  • Kingdom Animalia includes animals which are eukaryotic multicellular. They do not perform photosynthesis.

So, the correct option is C.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Kidney of vertebrates resembles with contractile vacuole of protozonas in 

  1. Expelling out glucose

  2. Expelling out urea and uric acid

  3. Expelling out excess of water

  4. Expelling out salts
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kidneys seem to have evolved in primitive freshwater vertebrates to help them expel the excess water that continuously entered the body by osmosis. Later, kidneys also acquired the function of removing the waste materials from body.

The kidneys in vertebrates are bean-shaped organs that remove excess organic molecules from the blood, and waste products of metabolism. In protozoans, the contractile vacuole does the function of the kidneys of vertebrates an expels the excess water from the system.

Therefore, the correct answer is option c.

Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

This taxonomic group of living organisms is primarily comprised of unicellular eukaryotes but does some members which are colonial, and some which display true multicellularity. The cells of organisms in this group have a nucleus and membrane-bound organelles, and include both autotrophic and heterotrophic organisms.
Which taxonomic group of organisms is described above?

  1. Kingdom Plantae

  2. Kingdom Fungi

  3. Kingdom Animalia

  4. Kingdom Protista

  5. Domain Bacteria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Plantae is the kingdom of multicellular and photoautotrophic organisms which grow indefinitely. The body is differentiated into root, stem and leaves. Mode of nutrition is autotrophic due to presence of chlorophyll. Cell wall is present which is made up of cellulose.
B. Fungi is a kingdom of heterotrophic organisms. Fungi have filamentous forms called hyphae.
C. Kingdom Animalia comprises multicellular organisms having eukaryotic cells. Cell wall is absent and the mode of nutrition is heterotrophic.
D. Kingdom Protista consists of eukaryotic organisms which are solitary unicellular or colonial unicellular. Cell wall may or may not be present. A well defined nucleus is present. The cytoplasm contains a variety of membrane bound organelles like mitochondrion, plastids, endoplasmic reticulum, Golgi bodies. Mode of nutrition may be autotrophic or heterotrophic depending upon the organisms.
E. Domain bacteria consists of prokaryotic organisms which lack a well defined nucleus and membrane bound organelles. Mode of nutrition is autotrophic ( photosynthetic and chemosynthetic) and heterotrophic.
So, the correct answer is Kingdom protista.
Multiple choice biology the world of microbes protista protozoa five kingdoms of living organisms

Choose the correct answers from the alternatives given.
Which of the following protists do not have multicellular representatives?

  1. Chrysophyta

  2. Phaeophyta

  3. Rhodophyta

  4. All of these include multicellular representatives
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chrysophyta, Phaeophyta, Rhodophyta are the group which contains multicellular organisms.

So, the correct option is 'All of these include multicellular representatives'.