Chp 25 Flashcards
which adaptation is found in the leaves of cacti?
they have been modified into spines
what is contained within the xylem sap of a plant?
water and dissolved minerals only
when can ice formation destroy plant cells?
as jagged ice crystals puncture cell membranes
in plants, how are the sugars produced from photosynthesis moved around?
via phloem sap
which plant is a perennial?
what type of plants flower only if day length is less than a critical value?
short-day plants
a greenhouse manager wants to encourage long-term, productive flowering instead of short-term, rapid flowering in annual garden plants that are for sale. Which action would accomplish that goal?
pruning away early flowers
which process occurs when a grapevine wraps around a trellis or another supporting structure?
thigmotropism
which plant hormone is responsible for apical dominance?
auxin
how can plants change rates of transpiration?
