Question

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.



B. Match the following:

1. Areolar tissue Subcutaneous layer

2. Skeletal muscle Buoyancy

3. Skin Fluid connective tissue

4. Cartilage Striated muscle

5. Blood Stratified squamous epithelium

6. Adipose tissue Surface of joints

7. Aerenchyma Packing tissue between various organs

E. Higher order Thinking Skills.

1. Why are vacuoles absent in meristematic tissue?

2. Due to excessive workout, an athlete was suffering from fatigue. He was

advised to take rest for sometime and rejoin

a. Why did he feel tired after the exercise?

b. Why was he asked to take rest and then join the practice again?

3. A plant tissue cells are elongated and thickened with cellulose strips at

the corners.​

Answer 1

Answer:

1. Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. ... This gives strength and flexibility to the tissue.
2. Cardiac muscle fibers look a lot like both smooth and striated muscle fiber because it is uninucleated & has dark as well as light bands called as striations. ... Cardiac muscle is kept under involuntary control so it tends to contract rhythmically under autonomous nervous control rather than conscious control
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.

higher-order things

1. Meristematic cells divide frequently and give rise to new cells and hence they need dense cytoplasm and thin cell wall. Vacuoles causes hindrance in cell division as it is full of cell sap to provide turgidity and rigidity to the cell. Also vacuoles basically serve the purpose of storing of nutrients, excess salts etc. Meristematic cells do not need to store these nutrients as they have compact shape.
2. The athlete felt tired after excessive workout because during workout, the body breaks down the stored glycogen which leads to depletion of glycogen in body. Due to this depletion, fatigue is caused. ... Athlete was asked to take rest so that the muscles could recover the lost glycogen stores

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Answer 2

Answer:

correct answer

Explanation: