Question

4. Give functions of:
a. Integuments
b. Nucellus
c. Funicle
d. Synergid cells
Antipodal cells​

Answer 1

The functions of-

a. Integuments:

• helps in locomotion, breathing and respiration
• feeding, excretion,
• protection from desiccation
• behavior, osmoregulation, water control, and as a food reserve

b. Nucellus:

• The nucellus is the largest part of the ovule.
• It houses the embryo sac as well as nutritive tissue .
• it remains present in some flowering plants after fertilization as a source of nutrients for the embryo.

c. Funicle:

• it is a stalk that attaches an ovule to the placenta in the ovary of a flowering plant.
• It contains a strand of conducting tissue leading from the placenta into the chalaza.

d. Synergid cells:

• these are two specialized cells that lie adjacent to the egg cell in the female gametophyte of angiosperms.
• it plays an essential role in pollen tube guidance and function.
• The synergids are also essential for the cessation of pollen tube growth and release of the sperm cells.

e. Antipodal cells

•   The function of the antipodal cells is to provide nourishment to the egg cell.
• It is rich in lipid content.
• They also form the basis of endosperm.