Question

In flowering plants, the plant tube first arrives in
(A)Egg
(B)Antipodal cell
(C)Synergids
(D)A central cell

Answer 1

A plant part may be a tubular structure produced by the male gametophyte of seed plants when it germinates. The plant part is the tube through which sperm from the pollen reaches the ovum, and fertilizes the plant to make seeds. The plant part of most seed plants acts as a passageway. It transports sperm cells from the pollen grain, from the stigma (in flowering plants) to the ovules at the bottom of the pistil.

Complete answer: Option (A)Egg: The egg cells develop in ovules that are sequestered within the ovary, an indoor part of the female-specific organ called the carpel. These tissues are collectively referred to as the feminine reproductive tract and contain the stigma, style, transmitting tract, and funiculus.
Option (B)Antipodal cell: Antipodal cells the three haploid cells that remain at the non-micropylar end of the EMBRYO SAC after the division of the cells. After the formation of the ovum, they pay little or no further part in seed development.
Option (C)Synergids: The typical embryo sac(Polygonum type) is 7-celled, 8-nucleate (two synergids, one egg, three antipodal, and one central cell). The synergids also are referred to as helpers. They assist in the distribution of nutrients within the embryo sac with the assistance of the filiform apparatus and also help in attracting pollen tubes towards the egg.
Option (D)A central cell: The central cell characterizes the angiosperm female gametophyte (embryo sac or megagametophyte) therein it directly participates in "double fertilization" to initiate endosperm development, a feature distinguishing angiosperm from all other plant taxa.
Thus, the correct option is Option C - Synergids

Note: When a pollen grain lands on the stigma of a flower of the right species, a plant part begins to grow. It grows through the design until it reaches an ovule inside the ovary. The nucleus of the pollen then passes along the plant part and fuses (joins) with the nucleus of the ovule.