Question

Пожалуйста помогите с этим тестом ⬇ 1. Челюсти птиц: А) неподвижно соединены черепом Б) превращено в роговые клюв В) покрыты роговыми зубчиками 2. К килю грудины прикрепляются: А) большие мышцы Б) подключичные мышцы В) малые грудные мышцы 3. Грудную полость птиц образуют: А) грудные позвонки, ребра, грудины Б) ребра, подключицы и грудная кость В) подключицы, вороньи кости, грудные позвоники

Answer 1

Ответ:

1 б

2 а

3 б

Объяснение:

это то что я помню из биологий 7 класса

Answer 2

Bird Jaw Structure:

The jaws of birds are B) covered with horny teeth. Unlike mammals, birds do not have true teeth. Instead, their jaws are covered with a hard, keratinized substance called rhamphotheca, which forms a beak or bill. This adaptation allows birds to have a lightweight and efficient feeding structure [[1]].

Attachment of the Keel to the Sternum:

The keel of the sternum in birds is the attachment site for the large flight muscles. The keel is a prominent ridge on the sternum that provides an anchor point for the powerful muscles responsible for flapping the wings during flight. These muscles, known as the pectoral muscles, are essential for generating the necessary lift and propulsion for birds to fly [[2]].

Components of the Avian Thoracic Cavity:

The thoracic cavity of birds is composed of several structures, including A) thoracic vertebrae, ribs, and sternum. These components provide support and protection for the internal organs, including the heart and lungs. The ribs and sternum also play a role in facilitating the movement of air in and out of the respiratory system during breathing [[3]].

I hope this helps! Let me know if you have any further questions.