With respect to angiosperms, which of the followingis incorrectly paired with its chromosome count?(A) egg—n(B) megaspore—2n(C) microspore—n(D) zygote—2n
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With respect to
is incorrectly paired with its chromosome count?
(A) egg—n
(B) megaspore—2n
(C) microspore—n
(D) zygote—2n
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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 cells of endosperm have 24 chromosomes. What will be the number of chromosomes in the gametes ? (a) 8 (b) 16 (c) 23 (d) 32Cleistogamous flowers are invariably autogamous because” (a) These flowers do not open at all. (b) There is no chance of cross – pollen landing on the stigma. (c) These flowers have exposed anthers and stigma. (d) These flowers are wind pollinated.
- Some dioecious species have the XY genotype for male andXX for female. After double fertilization, what would be thegenotypes of the embryos and endosperm nuclei?(A) embryo XY/endosperm XXX or embryo XX/endosperm XXY(B) embryo XX/endosperm XX or embryo XY/endosperm XY(C) embryo XX/endosperm XXX or embryo XY/endosperm XYY(D) embryo XX/endosperm XXX or embryo XY/endosperm XXYIn a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? ovary → style → stigma stigma → style → ovary ovary→ stigma→ style stigma→ ovary → styleIn 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
- Where in an angiosperm would you finda megasporangium?(A) in the style of a flower(B) enclosed in the stigma of a flower(C) within an ovule contained within an ovaryof a flower(D) packed into pollen sacs within the anthers found on astamenAnswer the diagram attached below: Determine the following structures with its ploidy level [Haploid (n) or Diploid (2n)] a) Pine Ovule with Developing Megagametophyte b) Pine Ovule with Mature MegagametophyteDraw a diagram of L.S. of an anatropous ovule of an Angiosperm & label the following parts :- (i) Nucellus (ii) Integument (iii) Antipodal cells (iv) Secondary Nucleus.
- How does a haplontic plant population maintain genetic diversity? Zygotes are produced by random fusion Gametes are created through meiosis Diploid spores undergo independent assortment during mitosis The zygote undergoes meiosis to generate a haploid sporophyte.Which of the following statements is accurate? a) All plants have identical sporangia, all producing the same type of spores b) Plants have an embryo that is protected inside (and nourished by) the gametophyte c) Gametangia produce gametes by meiosis whereas sporangia produce spores by mitosis d) Gametangia always produce haploid gametes whereas sporangia produce diploid spores e) Gametangia are multicellular structures whereas sporangia are unicellular structuresChrysopogon aciculatus is placed under microscope. When crushed, the seed is visible. Apparently, this species of plant is angiosperm. So how do I draw the diagram of the seed(?) for Chrysopogon aciculatus? Do i have to draw just the seed with a fruit coating or do i have to draw the stamen/ovary/stigma etc of Chrysopogon aciculatus' floret?. Attached is a picture of supposedly an angiosperm of Chrysopogon aciculatus , but how do i draw the seed diagram(?)