11. Trichology is related to which of the following statement?
[A] Study of nutrition
[B] Study of skin and stuffing
[C] Study of bony joints and ligaments
[D] Study of hair
Show Answer
Correct Answer: D [Study of hair]
Notes:
Trichology is the science of the structure, function and diseases of human hair.
12. Conifers can tolerate extreme environments because of__?
[A] Presence of vessels
[B] Thick cuticle
[C] Superficial stomata
[D] Broad hardy leaves
Show Answer
Correct Answer: B [Thick cuticle]
Notes:
Conifers (gymnosperms) are adapted to tolerate extreme environmental conditions due to their dense cuticle, sunken stomata and needle-like leaves.
13. Where are sexual reproduction and mobile cells absent?
[A] Chlorophyceae
[B] Rhodophyceae
[C] Myxophyceae
[D] Phaeophyceae
Show Answer
Correct Answer: C [Myxophyceae]
Notes:
Since being prokaryotic cells, they do not have chromosomes, so they lack sexual reproduction.
14. Fungal disease – Black rust of wheat is caused by?
[A] Melampsora lini
[B] Claviceps purpurea
[C] Puccinia graminis tritici
[D] Albugo candida
Show Answer
Correct Answer: C [Puccinia graminis tritici
]
Notes:
Leaf rust caused by Puccinia triticina is the most common rust disease of wheat. The disease occurs where wheat, barley, and other cereal crops are grown.
15. Bryophytes comprise__?
[A] The sporophyte is of longer duration
[B] Dominant phase of sporophyte which is parasitic
[C] Dominant phase of gametophyte which produces spores
[D] Small sporophyte phase and generally parasitic on the gametophyte
Show Answer
Correct Answer: D [Small sporophyte phase and generally parasitic on the gametophyte]
Notes:
The sporophyte is never independent inside the bryophytes, but parasitizes on the gametophytic plant, either partially for water and mineral supply or entirely for organic food.
16. Gymnosperms are never__?
[A] medium-sized trees
[B] tall trees
[C] herbs
[D] shrubs
Show Answer
Correct Answer: C [herbs]
Notes:
Living gymnosperms are predominantly middle-sized trees to tall trees and shrubs Rarely they are woody climbers. There are no herbs in gymnosperms.
17. What are the different stages of aerobic respiration?
[A] Glycolysis
[B] The Krebs cycle
[C] Oxidative phosphorylation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
There are three phases of aerobic cellular respiration: glycolysis, the Krebs cycle, and oxidative phosphorylation.
18. What is the role of indole acetic acid in plant growth?
[A] cell division and elongation
[B] tissue differentiation
[C] apical dominance
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Indole acetic acid is the main auxin in plants that regulates growth and development processes such as cell division and elongation, tissue differentiation, apical dominance, and responses to light, gravity, and pathogens.
19. Where does a functional megaspore develop in an angiosperm?
[A] Endosperm
[B] Embryo
[C] Embryo-sac
[D] Ovule
Show Answer
Correct Answer: C [Embryo-sac]
Notes:
Functional megaspore in an angiosperm develops into Embryo-sac. The embryo sac is an oval structure present in the ovule of flowering plants.
20. Which of the following are lower invertebrates?
[A] Porifera
[B] Platyhelminthes
[C] Nematoda
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Lower invertebrates are simpler in body organization. They include Protozoa, Porifera, Coelenterata (Cnidaria), Platyhelminthes, and Nematoda.
