Read the following statements regarding the organism Pavo : (i) The digestive tract has additional chambers, the crop and gizzard. (ii) The heart is completely four-chambered. (iii) Respiration is by lungs and air sacs connected to lungs supplement it. (iv) Long bones are solid and heavy to provide stability during walking. (v) They are viviparous with internal fertilisation. How many of the given statements are corr

Step-by-step solution

Pavo (Peacock) belongs to the class Aves. Statement (i) is correct: Birds have a digestive tract with additional chambers, the crop and gizzard. Statement (ii) is correct: The heart in birds is completely four-chambered. Statement (iii) is correct: Respiration is by lungs, and air sacs connected to the lungs supplement respiration. Statement (iv) is incorrect: The long bones of birds are hollow with air cavities (pneumatic) to reduce body weight, not solid and heavy. Statement (v) is incorrect: Birds exhibit intern