During formation of vertebrae, the most anterior embryonic segment that expresses Hoxc6 marks the end of the cervical (neck) vertebrae and the beginning of the thoracic (rib) vertebrae. All mammals have seven cervical vertebrae.
The chick and the goose have the same number of thoracic vertebrae. T/F

The correct answer is - false.

Explanation:

The thoracic vertebrae are normally known as the ribs. Thoracic vertebrae are the bones that form the spine. The major role of the ribs is to protect the vital organs such as lungs, heart and support the rib cage.

The number of thoracic vertebrae of goose and chick is different. The number of ribs in the chick are seven. Among the 7 the first two thoracic vertebrae did not reach the sternum however the rest attached to the sternum the point of attachment. In goose, the thoracic vertebrae are 9 in number. In birds, there is complicated the fusion of the thoracic including the 7th vertebrae of ribs.

Thus, the correct answer is - false.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.