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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- This figure summarises the life cycle of a seed plant. The blue circles named A and B represent the sexually mature individual of each phase of the life cycle. 1) What is this life cycle called? 2) Plant B is in the diploid phase. What is another name for this plant? 3) If A is the haploid phase, in which phase would you find sepals? Write just the letter of the individual corresponding to the correct phase 4) If B is the haploid phase, in which phase would you find synergids? Write just the letter of the individual corresponding to the correct phase 5) If B is the diploid phase, in which phase would you find the nucellus? Write just the letter of the individual corresponding to the correct phase 6) If A is the diploid phase, in which phase would you find the sperm cells? Write just the letter of the individual corresponding to the correct phase 7) If A is the diploid phase, in which phase would you find selection on flower colour? Write just the letter of the individual corresponding…The megaspore in most flowering plants grows into a megagametophyte that has seven cells and eight nuclei. Name and describe the seven cells.Arrange the following flower and fruit development processes in order. (1st step to 5th step)The microspore mother cell produces haploid microspores. => stepThe flower produces pollen grains that will land on the stigma. => StepThe tube cell forms the pollen tube, anchoring on the synergid. => StepFirst sperm will fertilize the egg to form the zygote (becoming the embryo later on). => StepThe ovary wall enlarges forming the pericarp. => Step
- Tomato has diploid chromosomes number of 24. How many chromosomes would be expected in: microspore mother cell a leaf cell an endosperm cell an egg nucleus a sperm nucleusWhat type of cell division occurs as a megaspore develops into a female gametophyte? Explain.In plant life cycles, (a) the first products of meiosis are gametes (b) spores are part of the diploid sporophyte generation (c) the embryo gives rise to a zygote (d) the first stage in the diploid sporophyte generation is the zygote (e) the first stage in the haploid gametophyte generation is the prothallus
- Figure 24.14 Which of the following statements is true? A dikaryotic ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores. A diploid ascus that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A haploid zygote that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A dikaryotic ascus that forms in the ascocarp undergoes plasmogamy, meiosis, and mitosis to form eight ascospores.Compare the Venn diagram of sexual reproduction and asexual reproduction in plants. Where in the diagram would you add identical to parent? A) A B) B C) C D) D use photo Not GradedPick the best description of the plant life cycle. Select one: O a. Zygote --> gametes --> mitosis --> multicellular haploid body --> mitosis --> multicellular diploid body --> meiosis O b. Zygote --> mitosis --> multicellular haploid body --> meiosis --> spores --> mitosis --> multicellular diploid body --> mitosis --> gametes O c. Zygote haploid body --> mitosis --> gametes --> meiosis --> spores --> mitosis --> multicellular O d. Zygote --> mitosis --> multicellular diploid body --> meiosis --> spores --> mitosis --> multicellular haploid body --> meiosis --> gametes O e. Zygote --> mitosis --> multicellular diploid body --> meiosis --> spores --> mitosis --> multicellular haploid body --> mitosis --> gametes
- The megaspore mother cell of an angiosperm has a diploid chromosome number of 2n=32. This megaspore mother cell undergoes meiosis to form 4 megaspores where only 1 survives while the other 3 died. the surviving megaspore undergoes mitosis 3 times to create 8 cells in the embryo sac. 1 egg cell. How many chromosomes are in an egg cell at G1?In most female gametophytes with eight nuclei, only the egg and the central cell nuclei do not degenerate. What would happen if the megaspore itself functioned as an egg and did not go on to produce other nuclei in a female gametophyte?Define the term inflorescence. Explain the basis for the different typesinflorescence in flowering plants.
