Download Chapter 24 Plants

In angiosperms, pollen grains are produced in
a. anthers.
b. carpels.
c. ovules.
d. sepals.
Which of the following is NOT part of the female structure of a flower?
a. filament
b. style
c. stigma
d. ovary
The specialized leaves of a flower that do not produce gametophytes are the
a. carpel and stamens.
b. filaments and anthers.
c. stigma and style.
d. sepals and petals.
A pollen grain landing on a stigma of a flower of the same species produces a
a. gametophyte.
b. pollen tube.
c. flower.
d. stamen.
In angiosperms, flowers are adaptations for reproduction. Which of the following does NOT usually describe flowers that
are pollinated by animals?
a. They are tiny.
b. They are brightly colored.
c. They produce nectar to attract pollinators.
d. They pollinate more efficiently than wind-pollinated plants.
In angiosperms, the ovary surrounds seeds in a structure called
a. an embryo.
b. a seed.
c. a fruit.
d. a vegetable.
.Which of the following correctly lists the terms in order from smallest to largest?
a. seed, embryo, fruit
b. fruit, embryo, seed
c. embryo, seed, fruit
d. embryo, fruit, seed
Figure 24–2
.In Figure 24–2, which fruit or fruits would you expect to be dispersed by animals?
a. only A
b. only B
c. both A and B
d. neither A nor B
.A seed that is dispersed to an area far away from the parent plant will always face less
a. competition for space.
b. chance of self-pollination.
c. favorable conditions for germination.
d. competition with the parent plants.
Seeds that are spread by wind and water usually are
a. lightweight.
b. large.
c. nutritious.
d. sweet and fleshy.
Seeds that are spread by animals usually are contained in
a. fleshy, nutritious fruits.
b. unripened ovaries.
c. thin coatings that are easily digested.
d. lightweight structures.
A period during which the embryo of a seed is alive but not growing is
a. dispersal.
b. fertilization.
c. germination.
d. dormancy.
A period of dormancy can allow seeds to germinate
a. under cold conditions.
b. under ideal conditions.
c. in extreme temperatures.
d. without water.
The plant embryo in a seed begins to grow again during
a. fertilization.
b. dormancy.
c. germination.
d. pollination.
A plant’s cotyledons
a. store nutrients and transfers them to the embryo during germination.
b. are the fleshy part of the fruit that contain the seeds and endosperm.
c. help the seeds to be dispersed by animals or by the wind.
d. play a role in regulating the length of the plant’s period of dormancy.
If the apical meristem of a mature plant is removed, the plant will most likely
a. lose its ability to develop new roots.
b. show a dramatic and rapid increase in height.
c. develop apical dominance and begin to flower.
d. lose apical dominance and grow lateral branches.