Question 1

The aptly named dead horse arum has a heat -producing flower. What advantage does this heat provide?

Accepted Answer

A)   It prevents inefficient pollinators from collecting pollen.
B)   It increases the evaporation of the scent, attracting pollinators from greater distances.
C)   It enables blooms to emerge through snow.
D)   It creates a barrier to invasive plant species.
E)   It warms the pollinators, which are usually bats. B

Question 2

__________results in the production of spores in flowering plants.

Accepted Answer

A)   Fertilization
B)   Meiosis
C)   Germination
D)   Spermatogenesis
E)   Mitosis B

Question 3

Yucca flowers are pollinated only by yucca moths, which lay their eggs in the flowerʹs ovary. This interaction ensures that the plant has seed for the next plant generation and that the moth larvae have a food source to develop. What is a potential disadvantage or vulnerability of this very specialized plant-animal interaction?

Accepted Answer

A)   Pollination can occur only during the day, but the moths are most active at night.
B)   The plant ovary may be consumed by the larvae, which would kill all the developing seeds.
C)   Other moths that do not serve as pollinators may outcompete the yucca moths.
D)   If the moths are exterminated by insecticides, the plant-animal interaction ceases and the plant will no longer be pollinated or reproduce. D

Question 4

You have some freshly produced seeds that refuse to germinate when placed in moist soil. What can you do to break dormancy and encourage the seeds to germinate?

Accepted Answer

A)   Boil them.
B)   Treat them with abscisic acid.
C)   Put them in the dark.
D)   Put them in sunlight.
E)   Freeze them, then follow up with sufficient warmth and moisture.

Question 5

What are the typical shape, color, and nectar content of a flower that is pollinated by a hummingbird? What are the traits of a bee-pollinated flower?

Accepted Answer

The answer of What are the typical shape, color, and...

Question 6

All of the following are included in the male parts of a flower EXCEPT

Accepted Answer

A)   anthers.
B)   pollen.
C)   stamens.
D)   ovules.

Question 7

In the development of a plantʹs ovule, the result is a gametophyte made up of

Accepted Answer

A)   eight haploid, uninucleate cells.
B)   seven diploid cells and one haploid cell.
C)   seven binucleate cells and one haploid cell.
D)   seven cells: six haploid cells and one cell with two nuclei.

Question 8

In many dicots, the first pair of leaves to emerge from the soil after seed germination is completely unlike all the rest of the leaves that form on that plant. In such plants, these leaves are

Accepted Answer

A)   formed from the endosperm.
B)   cotyledons, which have elongated and turned green.
C)   made from the opening and greening of the coleoptile.
D)   derived from the root, not the shoot.
E)   made from the epicotyl hook.

Question 9

Flowers that make pollen, but not ovules, lack

Accepted Answer

A)   sepals.
B)   carpels.
C)   stamens.
D)   filaments.
E)   petals.

Question 10

A pollen grain is actually the

Accepted Answer

A)   primitive egg cell, which will develop into the embryo.
B)   male gametophyte.
C)   female gametophyte.
D)   combination of male and female gametophytes.
E)   megaspore mother cell.

Question 11

A fruit is a mature

Accepted Answer

A)   integument.
B)   endosperm.
C)   ovary.
D)   cotyledon.
E)   embryo.

Question 12

The process in flowering plant reproduction in which the first sperm unites with an egg to form a diploid zygote and the second sperm unites with two haploid polar bodies to form the diploid endosperm is called double fertilization.

Accepted Answer

A) True 
 B)False

Question 13

In temperate deciduous forests, most of the small flowers that grow on the forest floor must complete their life cycle quickly before tree leaves shade out most of the light. Many of these plants reproduce asexually by runners. What advantages does this have for such plants?

Accepted Answer

The answer of In temperate deciduous forests, most of the...

Question 14

__________are modified leaves that are often green and surround the flower bud.

Accepted Answer

A)   Stigma
B)   Sepals
C)   Ovules
D)   Filaments
E)   Petals

Question 15

In the fern life cycle, how do spores and gametes differ?

Accepted Answer

A)   Gametes are produced by the sporophyte.
B)   Meiotic cell division produces haploid spores; mitotic cell division produces haploid gametes.
C)   Spores are produced mitotically; gametes are produced meiotically.
D)   Gametes are diploid; spores are haploid.
E)   Gametes are easily visible to the unaided eye; spores are not.

Question 16

During a late-summer walk through a park, you notice a tree that has remnants of many flowers but no fruits or seeds developing. There are no other trees like this one in the area. What could explain this occurrence?

Accepted Answer

A)   It is a female tree, and there are no known male trees of the same species in the area.
B)   It is a male tree with only male flowers that produce pollen, but no seed, and hence does not form fruit.
C)   It is actually a gymnosperm, not an angiosperm.
D)   It is a species that reproduces only by runners, not via fruits (or the seeds they contain) .

Question 17

What is the function of the stigma of a flower?

Accepted Answer

The answer of What is the function of the stigma...

Question 18

In flowering plants, the unfertilized ovule contains the

Accepted Answer

A)   female gametophyte.
B)   pollen grain.
C)   embryo.
D)   endosperm.
E)   stigma.

Question 19

In angiosperms, but not conifers, pollen grains can form pollen tubes.

Accepted Answer