Biological Classification Chapter-Wise Test 18

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following explains why fungi are classified separately from plants?

Fungi lack a cell wall
Fungi are heterotrophic
Fungi reproduce only sexually
Fungi do not have membrane-bound organelles
2

Fungi are heterotrophic, obtaining nutrients through absorption, whereas plants are autotrophic.

Which of the following groups of organisms are known as 'water molds'?

Ascomycetes
Basidiomycetes
Phycomycetes
Deuteromycetes
3

Phycomycetes, also called water molds, include fungi like Albugo that thrive in moist environments.

Which of the following statements about lichens is incorrect?

Lichens are a symbiotic association of fungi and algae.
Lichens are sensitive to air pollution.
Lichens can grow rapidly in highly polluted areas.
Lichens contribute to soil formation by breaking down rocks.
3

Lichens do not grow well in polluted areas and are highly sensitive to air pollution.

Which of the following organisms moves using flagella?

Amoeba
Paramecium
Trypanosoma
Plasmodium
3

Trypanosoma, a flagellated protozoan, moves using whip-like flagella.

Which of the following statements about protozoans is incorrect?

Protozoans are unicellular eukaryotic organisms.
Protozoans reproduce only sexually.
Protozoans include both free-living and parasitic forms.
Protozoans exhibit different types of locomotion.
2

Protozoans reproduce both asexually (binary fission) and sexually, depending on the species.

Which of the following is a characteristic of archaeal cell walls?

Contain peptidoglycan
Composed of pseudomurein or other polymers
Made of cellulose
Identical to bacterial cell walls
2

Archaeal cell walls are composed of pseudomurein or other polymers, distinguishing them from bacterial cell walls, which contain peptidoglycan.

Which of the following characteristics is common to all protozoans?

They are multicellular
They are unicellular eukaryotes
They have chloroplasts
They lack locomotion
2

All protozoans are unicellular eukaryotes, distinguishing them from multicellular organisms and prokaryotes. Some may have chloroplasts (e.g., Euglena), but not all, and most exhibit locomotion.

Which of the following statements about prions is incorrect?

Prions are infectious proteins.
Prions cause neurodegenerative diseases.
Prions contain DNA as genetic material.
Prions lack a cellular structure.
3

Prions are infectious proteins that lack any nucleic acid (DNA or RNA).

Which of the following organisms exhibits holozoic nutrition?

Paramecium
Nostoc
Mucor
Chlamydomonas
1

Paramecium exhibits holozoic nutrition, in which food is ingested, digested internally, and absorbed.

Which of the following groups includes the ‘red tide’ causing species?

Diatoms
Euglenoids
Dinoflagellates
Slime moulds
3

Dinoflagellates, such as Gonyaulax, cause red tides by rapidly multiplying and releasing toxins in marine environments.

Performance Summary

Score:

Category Details
Total Attempts:
Total Skipped:
Total Wrong Answers:
Total Correct Answers:
Time Taken:
Average Time Taken per Question:
Accuracy:
0