Question

Помогите!!! Широкая и мягкая часть пера называется : 1.Ствол 2.Опахало 3.Очина 4.Бородки Контурные перья налегают друг на друга и создают обтекаемую поверхность за счёт: 1.Бородок 2.Опахала 3.Очина 4.Ствола

Answer 1

Вабщето 1)2а второе (4)

Answer 2

Широкая и мягкая часть пера- 2) Опахало.
Контурные перья налегают друг на друга ...поверхность за счет 1) бородок

Answer 3

The parts of a feather

The feather of a bird consists of several distinct parts. Let's go through each of them:

1. Shaft: The central, rigid part of the feather is called the shaft or stem. It provides support and structure to the feather.

2. Vane: The vane is the broad, flat part of the feather that extends from the shaft. It is made up of many individual branches called barbs.

3. Barbs: Barbs are the smaller branches that extend from the shaft and make up the vane. They are connected to each other by tiny structures called barbules.

4. Barbules: Barbules are small, hook-like structures that link the barbs together, creating a smooth and cohesive surface on the vane.

5. Rachis: The rachis is the main axis of the feather, running along the center of the shaft and providing support to the barbs.

6. Plumulaceous region: The plumulaceous region refers to the soft, fluffy part of the feather found closer to the base. It is made up of downy barbs that lack the interlocking barbules found in the rest of the feather.

7. Calamus: The calamus, also known as the quill, is the hollow, tubular part of the feather that attaches it to the bird's skin.

Answering the question

Based on the provided options, the correct answers are:

- The wide and soft part of the feather is called the vane (option 2). - The contour feathers overlap each other and create a streamlined surface due to the presence of barbules (option 4).

Please let me know if there's anything else I can help you with!