Question

) Write the functional activity of the following : (i) Ciliated epithelium (ii) Micropyle in seed (iii) Stigma in flower (iv) Parenchyma (v) Cell wall in plant cell

Answer 1

i.Ciliated epithelium in the respiratory tract helps in mobilising the mucus and keeping the respiratory tract clear and unobstructed

ii.Micropyle may refer to:Micropyle (botany) a minute opening in the integument of an ovule of a seed plant. Micropyle (zoology), a differentiated area of surface in an egg, through which a sperm enters.

iii.The part of the pistil where pollen germinates.

iv.Parenchyma is a type of simple permanent tissue that makes a major part of ground tissues in plants, where other tissues like vascular tissues are embedded. They are non-vascular and composed of simple, living and undifferentiated cells, which are modified to perform various functions.

v.

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism

Answer 2

Answer:

1)Ciliated epithelium performs the function of moving particles or fluid over the epithelial surface in such structures as the trachea, bronchial tubes, and nasal cavities. It often occurs in the vicinity of mucus-secreting goblet cells.

2)When soaked in water, the seeds absorb water mainly through the micropyle and make it available to the embryo for germination.

3)The top of the female part of the flower which collects pollen grains

4)Plant parenchyma cells make up the bulk of leaves, flowers, and the growing, dividing inner parts of stems and roots. They perform functions such as photosynthesis, food storage, sap secretion, and gas exchange.

5)The Plant Cell Wall: A Complex and Dynamic Structure As Revealed by the Responses of Genes under Stress Conditions. The plant cell wall has a diversity of functions. It provides a structural framework to support plant growth and acts as the first line of defense when the plant encounters pathogens.

Explanation: