41) During the embryogenesis in higher plants, the zygote undergoes an asymmetri

Question

41) During the embryogenesis in higher plants, the zygote undergoes an asymmetric division and the A) TRUE B) FALSE lower, larger cell then goes on to contribute most to the plant body. During embryogenesis, cell fate is determined by: A) Cell lineage within the embryo B) Cell position within the embryo C) Hormone gradients in the embryo D) All of the above are correct E) B and C only are correct 42) Cell to cell movement of macromolecules in developing tissue tends to become more restrictive as the tissues ages. This is because intercellular movement through restrictive 43) becomes more 44) The shoot apical meristem of a developing embryo A) Matures early (-globular stage) in embryogenesis, at the site of an auxin maxima B) Matures early (-globular stage) in embryogenesis, at the site of an auxin minima C) Matures late (-late heart stage) in embryogenesis, at the site of an auxin maxima D) Matures late (-late heart stage) in embryogenesis, at the site of an auxin minima 45) Down the road from where I live, there is a beautiful hedge made from a unique plant that I covet. Disguised as a City of Denton employee, and pretending to read the gas meter, I snipped off several young branches. I took the cuttings back to my house and dipped the cut ends in "Dip-n- Grow" liquid rooting concentrate to get them to form roots. What is most likely the active ingredient in "Dip-n-grow"? A) Cytokinin D) Jasmonic acid E) Auxin F) Midichlorians B) Abscisic acid C) Gibberellic acid 46) Look at this flower. Pretty crazy, eh? This is called fasciation, and may result from inappropriate proliferation of the meristem during early development in the embryo. If this did indeed start early in development, from the list below, which is the most likely cause? A) An auxin maxima was established in the meristem resulting B) Cytokinins were inappropriately mobilized to the flanks of C) WUSCHEL activity became uncoupled from control by D) Cells in the hypocotyl region inappropriately interpreted E) in unregulated cell divisions the embryo where the cotyledons form CLAVATA3 their position as being the meristematic zone Cell layers were duplicated because the cell layer producing SHORT-ROOT did not communicate with the cell layer producing SCARECROW 47) Auxin transport from cell to cell is in part based on auxin existing as A) an anion in the apoplast, charge neutral in the cytoplasm, and polar distribution of eflux carriers B) charge neutral in the apoplast, a cation in the cytoplasm, and polar distribution of receptors C) charge neutral in the apolast, an anion in the cytoplasm, and polar distribution of efflux carriers D) a cation in the apolast, charge neutral in the cytoplasm, and equal distribution of efflux carriers E) a cation in the apolast, charge neutral in the cytoplasm, proton pumping ATPases

Explanation / Answer

41.) Option (A) The given statement is True, because during the process of embryogenesis in higher plants, the zygote undergoes an assymmetric division and the lower, larger cells then leads to the formation of plant body.

42.) Option - D is correct

Because the cell fate is determined by cell lineage, position abd hormonal gradient.

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