BMED Chapter 26- Seed Plants

3. Seed plants are ________.

a. all homosporous

b. mostly homosporous with some heterosporous

c. mostly heterosporous with some homosporous

d. all heterosporous

d

4. Besides the seed, what other major structure diminishes a plant’s reliance on water for reproduction?

a. flower

b. fruit

c. pollen

d. spore

c

5. In which of the following geological periods would gymnosperms dominate the landscape?

a. Carboniferous

b. Permian

c. Triassic

d. Eocene (present)

c

6. Which of the following structures widens the geographic range of a species and is an agent of dispersal?

a. seed

b. flower

c. leaf

d. root

a

7. Which of the following traits characterizes gymnosperms?

a. The plants carry exposed seeds on modified leaves.

b. Reproductive structures are located in a flower.

c. After fertilization, the ovary thickens and forms a fruit.

d. The gametophyte is the longest phase of the life cycle.

a

8. Megasporocytes will eventually produce which of the following?

a. pollen grain

b. sporophytes

c. male gametophytes

d. female gametophytes

d

9. What is the ploidy of the following structures: gametophyte, seed, spore, sporophyte?

a. 1n, 1n, 2n, 2n

b. 1n, 2n, 1n, 2n

c. 2n, 1n, 2n, 1n

d. 2n, 2n, 1n, 1n

b

10. In the northern forests of Siberia, a tall tree is most likely a:

a. conifer

b. cycad

c. Ginkgo biloba

d. gnetophyte

a

11. Which of the following structures in a flower is not directly involved in reproduction?

a. the style

b. the stamen

c. the sepal

d. the anther

c

12. Pollen grains develop in which structure?

a. the anther

b. the stigma

c. the filament

d. the carpel

a

13. In the course of double fertilization, one sperm cell fuses with the egg and the second one fuses with ________.

a. the synergids

b. the polar nuclei of the center cell

c. the egg as well

d. the antipodal cells

b

14. Corn develops from a seedling with a single cotyledon, displays parallel veins on its leaves, and produces monosulcate pollen. It is most likely:

a. a gymnosperm

b. a monocot

c. a eudicot

d. a basal angiosperm

b

15. Which of the following plant structures is not a defense against herbivory? a. thorns

b. spines

c. nectar

d. alkaloids

c

16. White and sweet-smelling flowers with abundant nectar are probably pollinated by

a. bees and butterflies

b. flies

c. birds

d. wind

a

17. Abundant and powdery pollen produced by small, indistinct flowers is probably transported by:

a. bees and butterflies

b. flies

c. birds

d. wind

d

18. Plants are a source of ________.

a. food

b. fuel

c. medicine

d. all of the above

d