Jessica Yadav

Differentiate between spongy and palisade parenchyma.

Palisade Parenchyma	Spongy Parenchyma
Their cells are columnar with intercellular spaces.	Their cells are oval or round in shape with air cavities.
They're found below the upper epidermis.	They're found below the palisade Parenchyma.
They're dark green in colour.	They're light green in colour.
They contain a high number of chloroplasts.	They contain comparatively lower number of chloroplasts.

What are the roles of meristem?

Meristem or meristematic tissues are tissues capable of cell division which are found in all the regions of the plants where growth takes place such as in apex, near internodes and also at the sides (in the lateral position of the plant body).

Therefore, their roles include to aid the primary and secondary growth of the plant body.

Name thin walled cells with chloroplast.

Parenchyma :)

What is sclereids?

Sclereids or stone cells are the dead cells having extremely thick wall which are spherical or oval shaped. They are generally found in hard parts of plant body.

Define cambium.

Cambium is a layer of actively dividing cells found between the xylem and phloem tissues that is

responsible for the secondary growth of stems and roots.

What are Annual rings?

Annual rings are the rings arranged in concentric forms in the bark of the tree, their numebr represmts the age of the tree whereas their thickness depends upon the season that the tree has lived through.

Give one example of scattered vascular bundle in the stem.

Maize aka Zea mays

What is the function cortex?

Cortex, tissue of unspecialized cells, is located between the epidermis and the vascular tissue in the plants . It helps in the transportation of water and minerals to the center or core of the root through the process of diffusion.

Mention the role of cuticle.

Cuticle is the outermost waxy/hydrophobic layer made up of cutin; it's main function is to prevent the loss of water in form of water vapor through the epidermis. It also helps in reduction of transpiration in the xerophytic plants to prevent water loss and provides protection against desiccation.