Answer Happy

In gymnosperms, the food source for the embryo in the seed is megagametophyte tissue. This tissue is present before the egg is produced and certainly before an embryo is formed. In flowering plants, the main food source for the embryo in the seed is endosperm. Endosperm has some benefits over gametophyte tissue as way to store food in a seed because O it is typically triploid rather than haploid. it can be produced in greater quantity. it is not produced unless an embryo is already developing. it has greater genetic diversity than gametophyte tissue.

Is it possible for a flower to be perfect and incomplete? ○ Yes, flowers can be perfect and incomplete. No, but they can be imperfect and complete O No, if a flower is perfect it must be complete. Question 9 In a typical plant, one megaspore survives and then goes on to produce the embryo sac. It turns out that in Lilium (and some other plants) all four megaspores survive. It works like this: A diploid cell (megasporocyte) goes through meiosis to produce 4 megaspores. Three of the megaspores fuse to form a triploid nucleus. The haploid and triploid nucleus each go through two rounds of mitosis to produce 8 nuclei. The antipodal cells are each triploid. The synergids and egg cell are haploid. After fertilization, what would the ploidy of the endosperm be? Diploid Triploid ○ Tetraploid Pentaploid Hexaploid