A. Give reasons, why.
1. Skeletal connective tissue is also known as supporting connective tissue.
2. Cardiac muscles are similar to both striated and unstriated muscles.
3. Cork acts as a protective tissue.
4. Animals of colder regions and fish of colder waters have a thicker layer of body fat
under the skin.
5. Branches of a tree move and bend freely in high wind velocity.
Answers
Answer:
1. Skeletal connective tissue is a type of connective tissue which is composed of solid matrix and cells. It consists of bone, cartilage, tendons and ligaments. The main function of it is to provide support and protect the soft part of the body. It also gives shape and form to the body.
2. Cardiac muscles have the property of both the striated muscles (or skeletal muscle) and unstriated muscle or smooth muscle. Cardiac muscle is involuntary, which is the property of smooth muscle. Cardiac muscles also have features of skeletal muscles.
3.The cork cells are dead and compactly packed with no intercellular space. Their cell walls are coated with a waxy substance, suberin, which do not allow water and gases to pass through. Therefore, it protects the plant against mechanical injury and also prevents the loss of water by evaporation.
4.Animals of colder regions and fishes of cold water have a thicker layer of subcutaneous fat, in order to retain heat in their body and thus maintaining the body temperature. Thicker the layer of subcutaneous fat, lesser will be the heat loss from the body.
5. Branches of a tree move and bend freely in high wind velocity because of the presence of collenchyma that adds the property of flexibility.