11. The highest fat content is found in the milk of which of the following animals? (UPSC Prelims 1991)
[A] Buffalo
[B] Cow
[C] Camel
[D] Reindeer
Show Answer
Correct Answer: A [Buffalo]
Notes:
Buffalo milk has the highest fat content, which is on average twice as high as that of cow milk. The fat-to-protein ratio in buffalo milk is about 2:1.
12. In a bisexual flower, if androecium and gynaecium mature at different times, which of the following is the name given to the phenomenon? (UPSC Prelims 2002)
[A] Dichogamy
[B] Herkogamy
[C] Heterogamy
[D] Monogamy
Show Answer
Correct Answer: A [Dichogamy]
Notes:
Dichogamy is the condition in which the male and female reproductive organs of a flower mature at different times, thereby ensuring that self-fertilization does not occur.
13. Which among the following is the method of growing plants in the absence of soil?
[A] Hydrology
[B] Hydrotectonics
[C] Hydroponics
[D] Hydrochronology
Show Answer
Correct Answer: C [Hydroponics]
Notes:
The method of growing plants in the absence of soil is called as hydroponics. The required suppliments to the plants are supplied through the mineral nutrient solutions.
14. In photosynthesis, light energy is converted into which form of energy?
[A] Electrical energy
[B] Kinetic energy
[C] Chemical energy
[D] Potential energy
Show Answer
Correct Answer: C [Chemical energy]
Notes:
In the process of photosynthesis, the energy from solar light is converted into the chemical energy.
15. 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.
16. What are the major types of cytoskeleton filaments?
[A] Actin filaments
[B] microtubules
[C] Intermediate filaments
[D] All of them
Show Answer
Correct Answer: D [All of them]
Notes:
Three major types of filaments make up the cytoskeleton: actin filaments, microtubules, and intermediate filaments.
17. Which of the following is wrong for bryophytes?
[A] Vascular tissue lacking clear
[B] Independent sporophyte absent clear
[C] Gametophyte reduced and dependent done
[D] Asexual reproduction by zoospores absent
Show Answer
Correct Answer: C [Gametophyte reduced and dependent done]
Notes:
The main plant of Bryophyta is the gametophyte. The gametophytic stage is independent.
18. Food is prepared in which part of the plant?
[A] Fruit
[B] Stem
[C] Leaves
[D] Root
Show Answer
Correct Answer: C [Leaves]
Notes:
Food in plants is prepared in leaves, all the essential components and raw materials like water, carbon dioxide, minerals reach to leaves. Leaves are also known as food factories in plants.
19. 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.
20. A structure in the plant’s male reproductive organ where the development of pollen takes place is called__.
[A] Microsporangium
[B] Somatic hybridization
[C] Sporulation
[D] Apomixis
Show Answer
Correct Answer: A [Microsporangium]
Notes:
A structure in the plant’s male reproductive organ where the development of pollen takes place is called Microsporangium. It is surrounded by four layers: Epidermis, Endothecium, Middle layers, Tapetum.
