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SC BIOL 425 - plant 2-3 (4)

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In ferns, the dominance of the 2n generation (sporophyte) is characteristic.Chloroplasts are specialized for photophosphorylation.Allopolyploidy is involved in sympatric speciation.One of the genetic consequences of meiosis is an increase in genetic variability.Darwin’s theory of evolution was NOT able to explain the mechanisms of heredity by Mendel.The shoot apical meristem is always part of the plumule.Sieve cells and sieve tube elements are living.The quiescent center is able to repopulate the bordering meristematic regions when injured.In the secondary plant body the phloem develops from the vascular cambium.In the primary plant body, the phloem develops from the procambium.Sun morphology can be produced only if the leaves are horizontal.The taxa genus contains the closest related species.In vascular plants, distance transportation of assimilates is conducted in sieve cells and sieve tube elements.Plant zygotes divide into the embryo and suspensor cells.Some specialized roots have negative geotropism.The leaf primordia are produced by the shoot apical meristems. Sun and shade morphology leaves can be found on the same plant.In tropical rainforest trees, annual rings are NOT generated by circadian rhythms.The asymmetric light signal overrules the geotropic signal in roots.The rootcap protects the apical meristem.The translocation of food reserves from the endosperm to the developing embryo can happen during the embryogenesis or during seed germination.Translocation is the exchange of sequences between nonhomologous chromosomes.The gametophyte produces gametes.Self-pollination is NOT a rare way of reproduction in higher plants.A possible cause of maternal inheritance: the plastids and mitochondria are excluded from the generative and sperm cells.Mucigel is not a lubricant and also a very important signal and support for Rhizosphere microbesThe role of the apical cell is to form the embryo through subsequent cell divisions.Polyploidization of all alloploids was frequently involved in hybrid species formation.The root epidermis allows free passage of water and minerals into the root cortex.Mitochondria did NOT evolve from Endosymbiotic anaerobic bacteria.The only role of the suspensor in gymnosperms is to push the embryo into nutritive tissues.Plants that reproduce only by self-pollination evolved from ancestors capable of outcrossing.Sieve tube elements of angiosperms have sieve platesSecondary growth gives rise to annual rings of the plant body.In the heart stage of development, the leaves of the “heart” develop into cotyledons. Mendel DID know about Darwin’s theory of evolution.The synthesis of food reserves is often associated with the maturation of seeds.The L1 and L2 layers of the tunica are part of the shoot apical meristem.Polyphyletic taxa contain members descended from more than one ancestral line.The central cells of the root apical meristem control the differentiation of initials. A true thorn is a modified branch.Three types of homeotic genes affect the identity of floral organs.Tracheids have secondary walls.Self-pollination is NOT a rare way of reproduction in higher


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