MCQ
Choose the correct sequence.
- Pachytene
- Zygotene
- Leptotene
- Diakinesis
- Diplotene
- A
- C, B, A, D, E
- B
- C, A, B, E, D
- C
- C, B, A, E, D
- D
- D, B, C, E, A
Explanation:
Duplication of centrioles occurs in S-phase. Protein synthesis occurs in G2 phase. Chromatin condensation is followed by centrioles movement towards the poles. (Prophase)
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$(i)$ These muscle fibres taper at both ends and do not show striations.
$(ii)$ The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
$(iii)$ They are 'involuntary' as their function cannot be directly controlled.