Answer
Verified
439.8k+ views
Hint: Pygostyle is a skeletal condition in which the final few caudal vertebrae are fused to form a single pygostyle complex or ossification. The pygostyle supports the tail feathers and musculature.
Complete Answer:
- The pygostyle is the main component of uropygium ( it is a structure which is commonly called as bishop’s nose, parson’s nose, pope’s nose or sultan’s nose.
- Pygostyle visible at the posterior end of birds.
- The pygostyle has a swollen appearance because it contains uropygial gland.
- Uropygial gland produces preen oil.
Evolution of pygostyle:
- Pygo Styles began to evolve in the early Cretaceaous period.
- The members of Confuciusornis are the earliest who have evolved this structure.
- This advantage of this structure is that this structure provides complete mobility to tail.
Types of pygostyle:
1. The first type of pygostyle is long or dagger blade like pygostyle. Their fossils do not show the traces of well developed rectrices. This type of pygostyle is found in the members of Confucius Ornithi Dae, Enantiornithes, etc.
2. The second type of pygostyle is plowshare shaped. These pygostyles have well developed rectrices. The central pair of retrices attached to pygostyle. This type of pygostyle is found in the members of Ornithurae, Confuciusornis, etc.
Therefore it is clear from the above discussion that the pygostyle is a complex formed by the fusion of tail vertebrae.
Hence, option B is the right option for this question.
Note: In modern birds there are retrices attached to pygostyle found. Pygostyle of bird Turkey is usually used as a food also.
Complete Answer:
- The pygostyle is the main component of uropygium ( it is a structure which is commonly called as bishop’s nose, parson’s nose, pope’s nose or sultan’s nose.
- Pygostyle visible at the posterior end of birds.
- The pygostyle has a swollen appearance because it contains uropygial gland.
- Uropygial gland produces preen oil.
Evolution of pygostyle:
- Pygo Styles began to evolve in the early Cretaceaous period.
- The members of Confuciusornis are the earliest who have evolved this structure.
- This advantage of this structure is that this structure provides complete mobility to tail.
Types of pygostyle:
1. The first type of pygostyle is long or dagger blade like pygostyle. Their fossils do not show the traces of well developed rectrices. This type of pygostyle is found in the members of Confucius Ornithi Dae, Enantiornithes, etc.
2. The second type of pygostyle is plowshare shaped. These pygostyles have well developed rectrices. The central pair of retrices attached to pygostyle. This type of pygostyle is found in the members of Ornithurae, Confuciusornis, etc.
Therefore it is clear from the above discussion that the pygostyle is a complex formed by the fusion of tail vertebrae.
Hence, option B is the right option for this question.
Note: In modern birds there are retrices attached to pygostyle found. Pygostyle of bird Turkey is usually used as a food also.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE