Q.Gynoecium with united carples is termed as

A gynoecium whose carpels are united/fused into a single compound structure is called syncarpous.

The gynoecium is the innermost, female whorl of a flower, made of one or more units called carpels, each with an ovary, style, and stigma. Based on how the carpels are arranged, the gynoecium is described as:

• Apocarpous: two or more carpels present, but each remains free and separate (e.g., rose, lotus).

• Syncarpous: two or more carpels are fused/united together to form a single compound ovary with (usually) one common style and stigma (e.g., mustard, tomato, hibiscus).

  'Multicarpellary' just means more than one carpel is present — it does not by itself say whether they are fused or free (a multicarpellary gynoecium can be either apocarpous or syncarpous), so it is not the most precise term for 'united carpels.'

The micropyle is a narrow opening in the integuments of the ovule that serves as the entry point for the pollen tube.

An ovule consists of a nucellus (containing the embryo sac) surrounded by one or two protective layers called integuments. The integuments do not completely enclose the nucellus - they leave a small apical opening called the MICROPYLE. In the most common mode of fertilization (porogamy), the pollen tube grows through the style, enters the ovule via the micropyle, and releases its two male gametes into the embryo sac. After fertilization, the micropyle often persists in the mature seed as a tiny pore through which water enters during germination.

The ovary is the swollen basal part of the pistil that contains the ovule(s) and later becomes the fruit; pollen grains and tapetum belong to the male (anther) side of the flower, not the ovule.