Identify the correct sequence of events with refernce to conjugation of Vorticella
(a) Amphimixis
(b) Disappearance of macronucleus
(c ) Attachment of the conjugants
(d) Post conjugation fissions
(e) Prezygotic nuclear divisions
(f) Postzygotic nuclear divisions.

Options

A. `ctobtoatoetod tof`
B. `ctobtoetoatoftod`
C. `ftoatod tobtoctoe`
D. `ftod toatoetobtoc`.

Answer

To identify the correct sequence of events in the conjugation of Vorticella, we can follow these steps:

1. **Attachment of the Conjugants (c)**: The process begins with the attachment of the male (microconjugate) and female (macroconjugate) gametes. This is the first step in the conjugation process.

2. **Disappearance of Macronucleus (b)**: After the attachment, the macronucleus and micronucleus of both conjugants undergo degeneration and disappear. This is the second step.

3. **Prezygotic Nuclear Divisions (e)**: Following the disappearance of the nuclei, prezygotic nuclear divisions occur. This involves the division of the micronuclei before the formation of the zygote. This is the third step.

4. **Amphimixis (a)**: After the prezygotic divisions, amphimixis occurs, where the male and female pronuclei merge to form a single nucleus called the syncarion. This is the fourth step.

5. **Postzygotic Nuclear Divisions (f)**: After the formation of the zygote, postzygotic nuclear divisions take place. This leads to the formation of multiple nuclei from the zygote. This is the fifth step.

6. **Post Conjugation Fissions (d)**: Finally, the newly formed nuclei undergo post conjugation fissions, resulting in the differentiation of macronuclei and micronuclei. This is the sixth and final step.

Putting it all together, the correct sequence of events is:
(c) Attachment of the conjugants → (b) Disappearance of macronucleus → (e) Prezygotic nuclear divisions → (a) Amphimixis → (f) Postzygotic nuclear divisions → (d) Post conjugation fissions.