Quiz 3 - Gymnosperms EPS
Pine leaf - what would this plant need to be adapted to the conditions indicated above?
higher elevation and higher latitude during frozen tend to be dry?
Wood is ____________
secondary xylem
What kind of xylem cells make up pine wood (and virtually all gymnosperms)?
Tracheids
Compare p.s. of Pinus & Tilia - what type of cells Eos angiosperm wood contain that is absent in gymnosperm wood?
vessel elements
How is pine pollen dispersed? What evidence suggests this?
wind; pollen have 2 wings
What is an ovule?
Holds female gametophyte
Pine leaf - What are three pieces of evidence to support the statement above?
1) thick cuticle (waxy layer) 2)stomate (down in crevices called sunken stomates) 3)low surface area
Female conifer cones - how many seeds are generally produced on each cone scale?
2
Compare p.s. of Pinus & Tilia - How old is each of your stem sections?
3
Why might the dispersal of pinyon differ? How might pinyon seeds be dispersed?
By animal,e tc.
How does the macerated angiosperm wood differ from the macerate gymnosperm wood?
Angiosperms has tracheas and vessel elements (transport H20)
Pine leaf - does this leaf indicate that pines are adapted to wet or dry conditions
Dry
What causes growth rings in tree?
Generation/transition late and early wood
Pinyon seed - Do you think the energy in the megagametophyte is stored as lipids or starch?
Lipids
What does gymnosperm mean?
Naked seed
Megastrobulis (female cone, ovulate cone) - genetics state of ovule integuments, megagametophyte, micropyle, and archegonium
Ovule integuments - diploid Mega - haploid Micropyle - haploid Archegonium - haploid
How does pollination of gymnosperm differ from that of angiosperms?
Ovule is exposed in gymnosperms (micropyle is open) at time of pollination
Compare p.s. of Pinus & Tilia - what structures is present in gymnosperm wood that is absent in angiosperm wood?
Resin ducts
How are pine seeds generally dispersed? What evidence suggest this?
Wing; wings
Pine reproduction - microstrobulis: what are the things on the sides of the pollen? What is their function?
Wings; function: dispersal via the wind
How does secondary growth based on a) direction of growth and b) meristems responsible for growth
a) secondary growth = girth Primary meristem = up (vertical) length of root and shoot b) Apical meristem = primary Secondary = vascular cambium
In conifers, male and female structures are generally produced on the same plant? is this condition dioecious or monoecious
monoecious
Compare p.s. of Pinus & Tilia - are the xylem cells living or dead
dead
In botanical sense, what is a pollen grain
gametophyte
Pinyon seed - Does the megagametophyte seem oily or starchy
oily