Question:
Protists are
(i) unicellular and prokaryote
(ii) unicellular and eukaryote
(iii) multicellular and eukaryote
(iv) autotroph or heterotroph
Protists are
(i) unicellular and prokaryote
(ii) unicellular and eukaryote
(iii) multicellular and eukaryote
(iv) autotroph or heterotroph
Updated On: Jun 7, 2022
- (i), (ii) and (iii)
- (ii), (iii) and (iv)
- (iii), (iv)
- (ii), (iv)
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The Correct Option is D
Solution and Explanation
A five kingdom division of organisms was proposed by Whittaker. Protista is one of that division. It is a kingdom of unicellular, eukaryotic organism. Many of them are photosynthetic autotrophs, unicellular algae and diatoms. Some protists are heterotrophic e.g. Protozoa.
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Concepts Used:
Prokaryotic Cells
Prokaryotic cells are single-celled microorganisms known to be the earliest on earth. Prokaryotes include Bacteria and Archaea. The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis.
A prokaryotic cell contains a single membrane and therefore, all the reactions occur within the cytoplasm. They can be free-living or parasites.
Characteristics of Prokaryotic Cell:
Prokaryotic cells have different characteristic features such as:
- Lack of a nuclear membrane.
- Absence of Mitochondria, Golgi bodies, chloroplast, and lysosomes.
- Presence of genetic material on a single chromosome.
- Lack of histone proteins in the constituents of eukaryotic chromosomes.
- The cell wall is made up of carbohydrates and amino acids.
- The plasma membrane acts as the mitochondrial membrane carrying respiratory enzymes.