BIO clicker and final
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water and minerals can move from the soil to the root xylem. which statement correctly describes apoplastic path?
intercellular spaces and cell wall regions
what does abscisic acid do?
maintains seed dormancy and winter dormancy; closes stomata
what do auxins do?
promote stem elongation, adventitious root initiation, and fruit growth; inhibit axillary bud outgrowth and leaf abscission
what do brassinosteroids do?
promote stem and pollen tube elongation; promote vascular tissue differentiation
what do cytokinins do?
inhibit leaf senescence; promote cell division and axillary bud outgrowth affect root growth
what does ethylene do?
promotes fruit ripening and leaf abscission; inhibits stem elongation and gravitropism
what do gibberellins do?
promote seed germination, stem growth, and fruit development; break winter dormancy; mobilize nutrient reserves in grass seeds
how do shoots and roots show opposite responses to gravity?
- shoots grow away from it
- roots grow towards it
how does auxin promote cell growth in stem growth?
auxin moves towards lower side and stimulates cell growth on the underside bending upwards
how does a plant know when to flower?
depending on the species, a plant is induced to flower when a particular combination of day-length and night-length in a 24-hour cycle is obtained
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