11. Which among the following is the smallest endocrine gland in the human body?
[A] Pineal gland
[B] Pancreas
[C] Hypothalamus
[D] Liver
Show Answer
Correct Answer: A [Pineal gland]
Notes:
Pineal gland which is located in brain’s midline is the smallest of all the endocrine glands. Melatonin harmone is secreted by the pineal gland.
12. Who gave theory of photosynthesis?
[A] Maurice Hilleman
[B] Jack Horner
[C] Jan Ingenhousz
[D] Franz Mesmer
Show Answer
Correct Answer: C [Jan Ingenhousz]
Notes:
Jan Ingenhausen is a Dutch-born British physician and scientist, best known for his discovery of the process of photosynthesis, by which green plants absorb carbon dioxide and release oxygen in sunlight.
13. Which of the following possesses the characteristics of both plants and animals?
[A] Azolla
[B] Lycopodium
[C] Euglena
[D] Sphagnum
Show Answer
Correct Answer: C [Euglena
]
Notes:
Euglena is an example of the Protista kingdom and has both plant and animal characteristics.
14. What kind of virus is measles?
[A] enveloped RNA virus
[B] Coronaviridae
[C] tobacco mosaic virus
[D] Npne of these
Show Answer
Correct Answer: A [enveloped RNA virus]
Notes:
Measles is caused by a single-stranded, enveloped RNA virus with a serotype 1. It is classified as a member of the genus Morbillivirus in the Paramyxoviridae family. Humans are the only natural host of the measles virus.
15. What is a motile flagellated asexual cell called?
[A] Sperm
[B] Zoospore
[C] Oospore
[D] Androspore
Show Answer
Correct Answer: B [Zoospore]
Notes:
A zoospore is a motile asexual spore that uses the flagellum for locomotion. These are also called swarm spores.
16. Which of the following statements regarding algae is incorrect.
[A] Most algae are photosynthetic
[B] Algae can be classified according to their pigments
[C] All algae are filamentous
[D] Spirogyra does not produce zoospores
Show Answer
Correct Answer: C [All algae are filamentous]
Notes:
Most algae are photosynthetic, Algae can be classified according to their pigments and Spirogyra does not produce zoospores.
17. The resin duct of a gymnospermous stem is an example of__?
[A] Big vacuole
[B] Lysigenous cavity
[C] Intercellular space
[D] Schizogenous cavity
Show Answer
Correct Answer: D [Schizogenous cavity]
Notes:
Schizogenous cavities are formed by the separation of glandular cell initials, resulting in a space lined by secretory epithelial cells.
18. Euphorbiaceae, Apocynaceae, Composites come under which tissue?
[A] Laticiferous
[B] Glandular
[C] Sclerenchyma
[D] Collenchyma
Show Answer
Correct Answer: A [Laticiferous]
Notes:
Euphorbiaceae, Apocynaceae, Composites come under Laticiferous tissues.
19. On which of the following factor rates of photosynthesis depends?
[A] pH
[B] Pressure
[C] Intensity of Light
[D] Amount of reactance
Show Answer
Correct Answer: C [Intensity of Light]
Notes:
The rate of photosynthesis mainly depends on the Intensity of Light, carbon dioxide concentration, and temperature.
20. Which of the following stimulates by gibberellin hormone?
[A] shoot elongation
[B] seed germination
[C] fruit and flower maturation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Gibberellins hormones stimulate shoot elongation, seed germination, and fruit and flower maturation.
