11. Which part of the plant is used in making saffron spice?
[A] Stigma
[B] Sepal
[C] Petal
[D] Leaf
Show Answer
Correct Answer: A [Stigma]
Notes:
Stigma of the plant is used in making the saffron spices. In making the saffron spice, stigma of the plant is used. Stigma is the top of the centre part of a flower. It receives the pollen that allows it to form new seeds.
12. In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?
[A] 2:2
[B] 1:3
[C] 4:1
[D] 3:1
Show Answer
Correct Answer: B [1:3]
Notes:
At least one of the spores develop into haploid female gametophytes thus making the ratio of functional and degenerate megaspores is 1:3. Out of the four, three megaspores degenrate.
13. In the names Mangifera indica (mango), Solanum tuberosum(potato) and Panthera leo(lion), what does the three names, indica, tuberosum and leo represent?
[A] Taxonomic Hierarchy
[B] Specific Epithet
[C] Binomial Nomenclature
[D] Identification
Show Answer
Correct Answer: B [Specific Epithet]
Notes:
A specific epithet is the second part of a species name in binomial nomenclature in any branch of biology. In botany, the second part of a botanical name. Specific epithet (zoology), also called the specific name, meaning the second part of the species name or binomen.
14. Which of the following is caused by massive deforestation? (UPSC Prelims 1986)
[A] Soil erosion
[B] Famine
[C] Floods
[D] None of these
Show Answer
Correct Answer: A [Soil erosion]
Notes:
Deforestation causes soil erosion. Tree roots anchor the soil. Without trees, the soil is free to wash or blow away, which can lead to vegetation growth problems.
15. Which one of the following diseases is least infectious? (UPSC Prelims 1991)
[A] Leprosy
[B] Tuberculosis
[C] Conjunctivitis
[D] Hepatitis
Show Answer
Correct Answer: D [Hepatitis]
Notes:
Most noninfectious causes of hepatitis are not contagious. Hepatitis caused by alcohol poisoning, medications, or toxins or poisons are not transmitted from person to person.
16. Which of the following is done by an Antigen? (UPSC Prelims 1997)
[A] Lowers body temperature
[B] destroys harmful bacteria
[C] triggers the immune system
[D] is used as an antidote to poison
Show Answer
Correct Answer: C [triggers the immune system]
Notes:
An antigen is any substance that causes your immune system to produce antibodies against it. An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen. An antigen may also form inside the body.
17. Lepidopterology is a branch of biology, which deals with the studies of which of the following?
[A] Lipids and fats
[B] Butterflies and moths
[C] Tongue
[D] Lakes and Ponds
Show Answer
Correct Answer: B [Butterflies and moths]
Notes:
Lepidopterology is a branch of entomology that deals with the scientific study of moths and three superfamilies of butterflies.
18. Which phylum does the salamander belong to?
[A] Mollusca
[B] Amphibians
[C] Reptiles
[D] Mammals
Show Answer
Correct Answer: B [Amphibians]
Notes:
Those organisms which can live on both land and water are called amphibians. Some examples of amphibians are frogs and toads, newts, salamanders and caecilians.
19. The study of cell biology is related to which of the following?
[A] the cell is the fundamental unit of life
[B] cell structure and function
[C] Both 1 & 2
[D] None of these
Show Answer
Correct Answer: C [Both 1 & 2 ]
Notes:
Cell biology is the study of cell structure and function. It revolves around the concept that the cell is the fundamental unit of life.
20. What is the translucent fluid part of the cytoplasm called?
[A] Cell protein
[B] Cytosol
[C] Matrix
[D] Organelles
Show Answer
Correct Answer: B [Cytosol]
Notes:
Cytosol is the liquid found inside cells. It is a water-based solution that floats organelles, proteins, and other cell structures.
