You are studying a type of plant known as " rockcress" or Arabidopsis sp. You discover a mutant in which the central cell of the female gametophyte cannot be fertilized. What structure will not form in these mutant plants? Synergids Pollen tube Endosperm Egg cell
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- In flowers, the structures that produce male gametophytes are called _______ ;the strcutures that produce female gametophytes are called _______ . a. pollen grains; flowers c. anthers; stigma b. stamen; carpels d. megaspores; microsporesDouble fertilization in flowering plants occurs when one sperm cell fuses with an egg to form a diploid cell, the ______, and a second sperm fuses with the two nucleiof the central cell of the female gametophyte. This triploid cell will divide mitotically to form a food-storage tissue called the_______ . This food is transferred to the developing plant embryo by structures called_______ .The megaspore in most flowering plants grows into a megagametophyte that has seven cells and eight nuclei. Name and describe the seven cells.
- In animals, meiosis produces gametes (sperm cells and egg cells), but that does not happen in plants. When some of the cells of a sporophyte undergo meiosis, what types of cells are produced? What do they grow into?Which of the following pairs of plant structure has the haploid number ofchromosomes? A. Megaspore mother cell and antipodal cells B. Egg cell and antipodal cells C. Egg cell and endosperms D. Microspore mother cell and antipodal cellsThe leafy, green moss plants that are familiar are gametophytes, haploid plants. This is very different from flowering plants and other seed plants. Does a leafy green moss plant grow from a spore or from a fertilized egg? Does the moss plant have both paternal parent and maternal parent?
- A diploid plant cell contains 54 chromosomes (2n=54). Describe the number arrangements of chromosomes in each of the following: a.A leaf cell immediately following cytokinesis b.A gametophyte cell at the conclusion of the S phase of mitosisMitotic Cell division occurs in dogs, potato, zebra, and parrots cells. Which character will be absent in potato plants but present in dogs, zebra, and parrots cells? a. Root apical meristems are present where mitosis occurs. b. The resulting cells will contain exact numbers of chromosomes comparing parental cells. c. Star shaped Aster formation occurs around centrioles. d. Cell plate formation occurs.What is the ploidy of two daughters of a dividing cell of a hornwort’s gametophyte? Select one: a. aploid b. diploid c. none of these choices d. haploid e. triploid f. tetraploid
- In the alternation of generations in plants, the gametophyte is _______ and produces gametes by _______. a. haploid; mitosis c. haploid; meiosis b. diploid; mitosis d. diploid; meiosisIn a particular plant species, 2n=12. For this organism, how many chromosomes, and how many DNA molecules will be present per cell for each of the following? e) root meristem cell in telophase of mitosis (cytokinesis complete) f) microspore mother cell (in anther) in prophase 1 of meiosis g) microspore mother cell in metaphase II of meiosis h) pollen grain ( after meiosis is and cytokinesis complete)In the vascular seedless plants and vascular seed plants, the main vegetative structures (such as the leaves) are: Question 34 options: Diploid cells of the gametophyte. Diploid cells of the sporophyte Haploid cells of the sporophyte. Haploid cells of the gametophyte.
