General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
21. Exobiology refers to the study of which of the following?
[A] Organism
[B] Endodermis
[C] Life in the air
[D] Life on the other planets
Show Answer
Correct Answer: D [Life on the other planets]
Notes:
Exobiology is the study of the origin, evolution and distribution of life in the context of cosmic evolution.
22. Who is known as father of soil science?
[A] Norman Ernest Borlaug
[B] V.V. Dokuchaev
[C] Liberty Hyde Bailey
[D] Eratosthenes
Show Answer
Correct Answer: B [V.V. Dokuchaev]
Notes:
Vasily Vasil’evich Dokuchaev is the father of soil science.
23. Which of the following are blue-green algae?
[A] Prokaryotes
[B] Eukaryotes
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: A [Prokaryotes]
Notes:
Blue-green algae or cyanobacteria are prokaryotes. They lack membrane bound organelles and a nucleus.
24. Into how many subgroups is the plant kingdom classified?
[A] Three
[B] Four
[C] Five
[D] Six
Show Answer
Correct Answer: C [Five]
Notes:
The plant kingdom has been classified into five subgroups: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, Angiosperms
25. What are the similarities between gymnosperms and angiosperms?
[A] The phloem of both have companion cells
[B] The endosperm is formed before fertilization in both
[C] Origin of ovule and seed is similar in both
[D] Both have leaves, stem, and roots
Show Answer
Correct Answer: D [Both have leaves, stem, and roots]
Notes:
Both gymnosperms and angiosperms have leaves, stems, and roots.
26. Which gas is taken in by plants in the process of photosynthesis?
[A] Oxygen
[B] Carbon dioxide
[C] Nitrogen
[D] Argon
Show Answer
Correct Answer: B [Carbon dioxide]
Notes:
During photosynthesis, plants take in carbon dioxide, water, and sunlight and release oxygen. Photosynthesis occurs in Chloroplasts in presence of chlorophyll pigment.
27. Plants are the only organisms that can prepare food for themselves by using which of the following substances?
[A] water
[B] carbon dioxide
[C] minerals
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Plants are the only organisms that can prepare food for themselves by using water, carbon dioxide and minerals. The raw materials are present in their surroundings.
28. Rice, wheat, maize, marigold, banana, and all cotyledons are some examples of which root system?
[A] Fibrous Root System
[B] Tap Root System
[C] Adventitious roots
[D] Both 1 and 2
Show Answer
Correct Answer: A [Fibrous Root System]
Notes:
Rice, wheat, maize, marigold, banana, and all cotyledons are some examples of the Fibrous Root Systems.
29. The flagellated cells that line the spongiocoel in poriferans are called__.
[A] ostia
[B] mesenchymal cells
[C] choanocytes
[D] oscula
Show Answer
Correct Answer: C [choanocytes]
Notes:
The flagellated cells that line the spongiocoel in poriferans are called choanocytes. Choanocytes are found in sponges and the phylum to which it belongs is known as pore bearer.
30. Which of the following is / are correct features of amphibians?
[A] unable to regulate body temperature
[B] able to regulate body temperature
[C] heart is three chambered.
[D] All of the above
Show Answer
Correct Answer: A [unable to regulate body temperature]
Notes:
Amphibians are unable to regulate body temperature, skin types limit distribution to warm, moist climates, and fertilization may be internal or external.
