11. Who is known as the father of the word ecosystem?
[A] Carl Linnaeus
[B] Pier Antonio Micheli
[C] Arthur Tansley
[D] Edwin John Butler
Show Answer
Correct Answer: C [Arthur Tansley]
Notes:
The term ecosystem was coined by British ecologist Arthur Tansley in 1935.
12. Which of the following cell organelles contain RNA?
[A] Plastids
[B] Mitochondria
[C] Ribosomes
[D] Lysosomes
Show Answer
Correct Answer: C [Ribosomes]
Notes:
Ribosomes are small organelles that contain RNA and specific proteins within the cytoplasm.
13. Which of the following virus is covered?
[A] Adeno
[B] Herpes
[C] Polio
[D] None of these
Show Answer
Correct Answer: B [Herpes]
Notes:
The Herpesviridae are a large family of DNA viruses. It causes infections and some diseases in animals, including humans. Members of this family are also known as herpesviruses.
14. In bryophytes and pteridophytes, male gametes are transported through which of the following?
[A] Air
[B] Water
[C] Birds
[D] Insects
Show Answer
Correct Answer: B [Water]
Notes:
In plants, water acts as the channel through which gamete transfer takes place.
15. Bacteria come under which type of organisms?
[A] Single-celled
[B] Microscopic
[C] Living
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Bacteria are single-celled microorganisms that do not have a nucleus and other cell organelles. They are classified as prokaryotic organisms.
16. Where is the genetic system located in prokaryotes?
[A] nucleoid
[B] chromatin
[C] nuclear material
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
The genetic system located in prokaryotes in nucleoid, chromatin and nuclear material.
17. The sporophytic generation is represented only by the zygote__?
[A] Funaria
[B] Chlamydomonas
[C] Pinus
[D] Pinus
Show Answer
Correct Answer: B [Chlamydomonas]
Notes:
Important Features of Chlamydomonas: The plant body is unicellular, pear-shaped, and biflagellate, Each cell typically contains a cup-shaped chloroplast, an eye sac, and two contractile vacuoles, Pamela-stage appearance, Asexual reproduction occurs through biflagellate zoospore formation.
18. What is the arrangement of megaspores in tetrads in gymnosperms?
[A] Decussate
[B] Tetrahedral
[C] Linear
[D] Isobilateral
Show Answer
Correct Answer: C [Linear]
Notes:
These are formed from the mother cells inside the anther. Thus, the tetrad of the megaspore is usually linear.
19. Which of the following is not a macronutrient?
[A] nitrogen
[B] phosphorus
[C] magnesium
[D] chlorine
Show Answer
Correct Answer: D [chlorine]
Notes:
Macronutrients are nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. The micronutrients are boron, chlorine, copper, iron, manganese, molybdenum, and zinc.
20. One of the following is not an auxin.
[A] Indole-3-acetic acid
[B] Malic Hydrazide
[C] Indole butyric acid
[D] Naphthalene acetic acid
Show Answer
Correct Answer: B [Malic Hydrazide]
Notes:
Maleic hydrazide is a synthetic compound that has a plant growth regulating action. It is used as a potato foliar treatment to prevent volunteer formation and germination during storage.
