Ch. 23 Flashcards
Gymnosperms consist of all of the following EXCEPT _____.
a. Cycadophyta
b. Sphenophyta
c. Gnetophyta
d. Ginkgophyta
Sphenophyta
Unlike the seeds of angiosperms, the seeds of gymnosperms ____.
a. are enclosed in an ovule
b. are encased in a fruit
c. mature on the surface of a cone scale
d. store nutrients after fertilization
mature on the surface of a cone scale
Because they have large leaves, cycads are often confused with ______.
a. ferns
b. club mosses
c. quillworts
d. ginkgos
ferns
The microspores of cycads divide by _____ , forming four-celled microgametophytes.
a. pollination
b. mitosis
c. meiosis
d. none of the above
meiosis
Seed plants, also known as _____________, are divided into the gymnosperms and angiosperms.
a. embryophytes
b. spermatophytes
c. lycophytes
d. pterophytes
spermatophytes
An ovule of a cycad contains which of the following?
a. Leaf primordium.
b. Cotyledon.
c. Root apex.
d. All of the above.
All of the above.
Most maidenhair trees planted in populated areas are _____.
a. male
b. female
c. susceptible to pests
d. highly branched
male
The foul-smelling odor of the Ginkgo biloba comes from its _____.
a. pollen tube
b. seed coat
c. integument
d. spurs
seed coat
This species of Gymnosperm has been called a living fossil.
a. Zamia pumila.
b. Cycas revolute.
c. Ginkgo biloba.
d. Welwitschia mirabilis.
Ginkgo biloba.
Which of the following are members of the phylum Coniferophyta?
a. Pines.
b. Cypresses.
c. Ginkgoes.
d. A and B.
e. All of the above.
A and B
Wings” on the pollen shown help you to identify it as _____________pollen.
a. pine
b. cycad
c. ginkgo
d. gnetophyte
pine
Gymnosperms flourished during what evolutionary period?
a. Permian.
b. Cretaceous.
c. Cenozoic.
d. Carboniferous.
Permian
Seeds of a gymnosperm mature on the surface of the _____.
a. pollen grain
b. cone scale
c. cupule
d. modified leaf
cone scale
Cycads are known for their ______________.
a. small leaves
b. branched trunk
c. slow rate of growth
d. fast rate of growth
slow rate of growth
Microgametocytes that eventually form swimming sperm are unique to _____.
a. cycads
b. ginkgos
c. palms
d. all of the above
e. A and B
A and B