1. Filiform apparatus is found in which cells of the embryo sac?
A.
Egg cells
B.
Synergids
C.
Central cells
D.
Antipodal cells
Correct Answer:
Synergids
Explanation:
Filiform apparatus is a special thickening found in the synergids of the embryo sac.
2. At which end of the synergids is the filiform apparatus present?
A.
Micropylar end
B.
Chalazal end
C.
Lateral end
D.
Central end
Correct Answer:
Micropylar end
Explanation:
The filiform apparatus occurs at the micropylar end of each synergid.
3. What is the main function of the filiform apparatus?
A.
Formation of pollen grains
B.
Guiding the pollen tube
C.
Production of endosperm
D.
Development of the seed coat
Correct Answer:
Guiding the pollen tube
Explanation:
The filiform apparatus helps guide the pollen tube toward the synergids.
4. The filiform apparatus consists mainly of special:
A.
Cell wall ingrowths
B.
Chloroplasts
C.
Nuclear divisions
D.
Starch grains
Correct Answer:
Cell wall ingrowths
Explanation:
Filiform apparatus refers to finger-like or special cell wall ingrowths in synergids.
5. The filiform apparatus is associated with which structure during pollen tube entry?
A.
Synergids
B.
Antipodals
C.
Polar nuclei
D.
Egg cell wall only
Correct Answer:
Synergids
Explanation:
The filiform apparatus is located in the synergids and is involved in receiving and guiding the pollen tube.
6. Which structure helps attract or direct the pollen tube toward the micropylar region of the embryo sac?
A.
Filiform apparatus
B.
Seed coat
C.
Endosperm
D.
Integument
Correct Answer:
Filiform apparatus
Explanation:
The filiform apparatus in the synergids plays an important role in directing the pollen tube toward the micropylar region.
7. In a typical embryo sac, filiform apparatus is present in:
A.
Both synergids
B.
The egg cell only
C.
All three antipodal cells
D.
The central cell only
Correct Answer:
Both synergids
Explanation:
Each of the two synergids generally possesses a filiform apparatus at its micropylar end.
8. Which feature distinguishes the micropylar end of a synergid?
A.
Presence of filiform apparatus
B.
Presence of three polar nuclei
C.
Absence of a cell wall
D.
Formation of the seed coat
Correct Answer:
Presence of filiform apparatus
Explanation:
The micropylar end of a synergid contains the characteristic filiform apparatus.
9. The filiform apparatus is most directly involved in the interaction between the:
A.
Pollen tube and synergids
B.
Seed coat and fruit wall
C.
Antipodals and integuments
D.
Endosperm and seed coat
Correct Answer:
Pollen tube and synergids
Explanation:
The filiform apparatus of the synergids helps guide the pollen tube during its approach and entry.
10. Which statement about the filiform apparatus is correct?
A.
It is present at the chalazal end of the egg cell.
B.
It helps guide the pollen tube through the synergids.
C.
It develops into the endosperm after fertilisation.
D.
It forms the outer covering of the seed.
Correct Answer:
It helps guide the pollen tube through the synergids.
Explanation:
The filiform apparatus is a special structure of synergids that assists in guiding the pollen tube during fertilisation.
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