Question

plz ans these ques of 9th standard​

Answer 1

Explanation:

question 3rd

1. fibroblasts, macrophages and adipocytes

2. epithelial cell

3. neurons and glial cells

4. goblet cells and trachea

question 4th

1. Bone and cartilage-A bone is a hard connective tissue, while cartilage is soft connective tissue. Bones form the skeletal structure of the body, whereas cartilage is present in nose, ear, ribs, larynx, and joints and also act as a shock absorber in these joints.

2. parenchyma and sclerenchyma -Parenchyma cells are found in every soft part of the plant, but collenchyma cells are found in specific part of the plant like leaves, stems, and petioles, whereas sclerenchyma cells are found in mature parts of the plants or trees. ... Parenchyma has a thin cell wall of their cells, and are made up of cellulose.

question 5th

(1) Phloem parenchyma: transport of nutrients and storage of organic food.

(2) Phloem fibres: they are non-living component of phloem. They provide mechanical support.

(3) Companion cells: provide ATP and nutrients to carry out cellular functions.

Answer 2

3) i) Stratified epithelium cells, ii) cuboidal epithelium cells , iii) Neurones (nerve cells) and glial cells, iv) Ciliated columnar epithelium cells

4) (A) Bones are the hard, inelastic and a tough organ that forms part of the vertebral skeleton whereas Cartilage is a soft, elastic and flexible connective tissue that protects the bone from rubbing against each other.

(B) Bone cells are known as osteocytes whereas Cartilage cells are known as chondrocytes.

(C) In bones there is presence of calcium phosphate in the matrix but Cartilage has no calcium phosphate in the matrix.

(D) In bone, the matrix is both organic and inorganic but in carilage, the matrix is completely organic.

bone, the matrix is both organic and inorganic but in carilage, the matrix is completely organic.(ii) (A) Parenchymatous cells are thin walled and unspecialised whereas Sclerenchymatous cells are thick walled and lignified.

(B) Parenchymatous cells are living cells whereas Sclerenchymatous cells are dead cells.

(3) Parenchymatous Cells are usually loosely packed with large intercellular space whereas Sclerenchymatous cells have intercellular spaces between the cells.

5) Phloem tissue is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells.

FUNCTIONS : i)Sieve tubes help in the transport of food from leaves to storage organs and other parts of the plant.

ii) Companion cells help in the functioning of the sieve tube cell.

iii) Phloem fibres mainly provide support.

iv) Phloem parenchyma is mainly concerned with storage of starch, fat and other organic food material.