The kingdom that includes unicellular eukaryotic organisms is: MCQ with Answer and Explanation

The kingdom that includes unicellular eukaryotic organisms is:
A. Plantae
B. Fungi
C. Monera
D. Protista
Answer: Option D
Solution (By JKSSB Mock Tests)
Protista consists of unicellular eukaryotes like protozoans, unicellular algae, and slime molds. Monera includes prokaryotes, Fungi are mostly multicellular eukaryotes (except yeast), Plantae are multicellular autotrophs.

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Practice More Biology Questions

Question #1
Identify the correct statement about plant water relations:
A. Turgor pressure keeps plant cells rigid.
B. Plasmolysis occurs in hypotonic solutions.
C. Osmosis is the movement of solutes.
D. Water potential is higher in concentrated solutions.

Correct Answer: Option A


Explanation:
Turgor pressure from water in the vacuole pushes the cell membrane against the wall, maintaining rigidity. Plasmolysis occurs in hypertonic solutions; osmosis is water movement; high solute concentration lowers water potential.

This question belongs to: Science Biology
Question #2
Consider statements about microorganisms: 1. Bacteria are prokaryotes. 2. Fungi are eukaryotes. 3. Viruses have a cellular structure. Which are correct?
A. 1 and 3 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 and 2 only

Correct Answer: Option D


Explanation:
Bacteria are unicellular prokaryotic organisms, characterized by the absence of a true, membrane-bound nucleus and other membrane-bound organelles. Fungi are eukaryotic organisms, possessing a true nucleus and membrane-bound organelles, and can be unicellular (yeasts) or multicellular (molds, mushrooms). Viruses are acellular, non-cellular entities; they consist of genetic material (DNA or RNA) enclosed in a protein coat (capsid) and lack any cellular structure or independent metabolic machinery. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology
Question #3
The symbiotic relationship where one organism benefits and the other is unaffected is:
A. Parasitism
B. Commensalism
C. Predation
D. Mutualism

Correct Answer: Option B


Explanation:
Commensalism (+/0) involves one species benefiting and the other neither harmed nor helped. Example: barnacles on a whale, or cattle egrets eating insects stirred by cattle. Mutualism benefits both (+/+), parasitism benefits one at expense of other (+/-), predation (+/-) involves killing. The distinction is based on the net effect.

This question belongs to: Science Biology