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Fillform apparatus are found in -
  • a)
    Antipodal cell
  • b)
    Egg cell  nucleus
  • c)
    Secondary
  • d)
    Synergids
Correct answer is option 'D'. Can you explain this answer?
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Fillform apparatus are found in -a)Antipodal cellb)Egg cellnucleusc)Se...
Fillform apparatus are found in:
- Synergids: The fillform apparatus is located in the synergids, which are specialized cells found in the female reproductive organs of plants.
- Function: The fillform apparatus plays a crucial role in the process of fertilization in plants.
- Structure: The fillform apparatus consists of three main components:
- Two secondary nuclei: These nuclei are located at the center of the synergids and are responsible for the fusion with the male gametes during fertilization.
- Two polar nuclei: These nuclei are located at the sides of the synergids and are involved in the formation of the endosperm, a nutrient-rich tissue that nourishes the developing embryo.
- One egg cell nucleus: The egg cell nucleus is also located within the synergids and is the female gamete that fuses with the male gamete during fertilization.
- Process: During fertilization, the pollen tube delivers the male gametes to the synergids. The fillform apparatus guides the pollen tube towards the synergid and facilitates the fusion of the secondary nuclei with the male gametes. This fusion results in the formation of a diploid zygote, which develops into an embryo.
- Importance: The fillform apparatus is essential for successful fertilization and the development of viable seeds in plants.
- Examples: The fillform apparatus is found in various plant species, including angiosperms (flowering plants) and gymnosperms (conifers and cycads).
Overall, the fillform apparatus is a crucial reproductive structure found in the synergids of plants. It plays a vital role in guiding the pollen tube and facilitating fertilization, leading to the formation of embryos and the development of seeds.
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Read the following text and answer the following questions on the basis of the same: Spark coil The principle of electromagnetic induction was discovered by Michael Faraday in 1831. Induction coils were used widely in electrical experiments and for medical therapy during the last half of the 19th century, eventually leading to the development of radio in the 1890's. The spark coil designed on the principle of electromagnetic induction was the heart of the earliest radio transmitters. Marconi used a spark coil designed by Heinrich Rhumkorff in his early experiments. An induction coil or "spark coil" is a type of electrical transformer used to produce high-voltage pulses from a low-voltage (DC) supply. To create the flux changes necessary to induce voltage in the secondary coil, the direct current in the primary coil is repeatedly interrupted by a vibrating mechanical contact called interrupter.The spark scoil consists of two coils of insulated wire wound around a common iron core. One coil, called the primary coil, is made from relatively few (tens or hundreds) turns of coarse wire. The other coil, the secondary coil typically consists of up to a million turns of fine wire (up to 40 gaug e). An electric current is passed through the primary, creating a magnetic field. Because of the common core, most of the primary's flux couples with the secondary. When the primary current is suddenly interrupted, the magnetic field rapidly collapses. This causes a high voltage pulse to be developed across the secondary terminals due to electromagnetic induction. Because of the large number of turns in the secondary coil, the secondary voltage pulse is typically many thousands of volts. This voltage is sufficient to create an electric spark, to jump across an air gap separating the secondary's output terminals. For this reason, this induction coils are also called spark coils. To operate the coil continually, the DC supply current must be repeatedly connected and disconnected. To do that, a magnetically activated vibrating arm called an interrupter is used which rapidly connects and breaks the current flowing into the primary coil. The interrupter is mounted on the end of the coil next to the iron core. When the power is turned on, the produced magnetic field attracts the armature. When the armature has moved far enough, contacts in the primary circuit breaks and disconnects the primary current. Disconnecting the current causes the magnetic field to collapse and create the spark. A short time later the contacts reconnect, and the process repeats. An arc which may form at the interrupter contacts is undesirable. To prevent this, a capacitor of 0.5 to 15 μF is connected across the primary coil.Why most of the primary's flux couples with the secondary in spark coil?

Fillform apparatus are found in -a)Antipodal cellb)Egg cellnucleusc)Secondaryd)SynergidsCorrect answer is option 'D'. Can you explain this answer?
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Fillform apparatus are found in -a)Antipodal cellb)Egg cellnucleusc)Secondaryd)SynergidsCorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Fillform apparatus are found in -a)Antipodal cellb)Egg cellnucleusc)Secondaryd)SynergidsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Fillform apparatus are found in -a)Antipodal cellb)Egg cellnucleusc)Secondaryd)SynergidsCorrect answer is option 'D'. Can you explain this answer?.
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