Chapter 29

The arrival of pollen grains on a receptive stigma is called _____. a. germination b. abscission c. pollination d. propagation

A pollinator may receive _____ when it visits a flower of a coevolved plant (choose all that apply). a. pollen b. nectar c. pathogens d. fruit

In flowers, the structures that produce male gametophytes are _____ , and the structures that produce female gametophytes are _____. a. carpels; stamens b. anthers; carpels c. pollen tubes; flowers d. megaspores; microspores

The _______ -of a flower contains one or more ovaries in which eggs develop, fertilization occurs, and seeds mature. a. pollen sac b. carpel c. ovule d. sepal

Seeds are mature _____ ; fruits are mature ______. a. ovaries; ovules b. ovules; sepals c. ovules; ovaries d. receptacles; ovaries

Cotyledons develop as part of ______. a. carpels b. accessory fruits c. embryo sporophytes d. flowers

The ______ are parts of a mature seed. a. stamen and carpel b. embryo, food reserves, and seed coat c. stigma, style, and ovary d. male and female gametophytes

A new plant forms from a stem that broke off of the parent plant and fell to the ground. This is an example of ______. a. nodal cloning b. exocytosis c. asexual reproduction d. tissue culture propagation

Choose the statement that is true. a. All flowers are pollinated by bees. b. Apple trees are propagated by grafting because they are triploid. c. Carpels function to attract pollinators. d. A coleoptile protects the embryonic shoot of eudicot seedlings. e. In plants, nonmotile sperm cells are male gametes. f. Nutrients in fruits nourish new seedlings.

An important difference between plant development and animal development is that _______. a. only plant development depends on hormones b. plants continue to develop throughout their lifetime c. hormones trigger cell division in animals, but not plants

Which of the following statements is false? a. Auxin and gibberellin promote stem elongation. b. Cytokinin promotes cell division in lateral buds. c. Ethylene delays fruit ripening and abscission.

In some plants, flowering is a ______ response. a. phototropic b. gravitropic c. photoperiodic d. thigmotropic

Match the response with its main trigger. $$ \text {phototropism } \quad \quad \text {a. contact with an object} $$ $$ \text {gravitropism } \quad \quad \text {b. blue light} $$ $$ \text {thigmotropism } \quad \quad \text {c. night length} $$ $$ \text {photoperiodism } \quad \quad \text {d. gravity} $$

Match the observation with the hormone. $$ \text {ethylene } \quad \quad \text {a. Homegrown seedless grapes are smaller than grocery store grapes.} $$ $$ \text {cytokinin} \quad \quad \text {b. The potted plant in your room is leaning toward the window.t} $$ $$ \text {auxin } \quad \quad \text {c. The last of your apples is getting really mushy.} $$ $$ \text {gibberellin } \quad \quad \text {d. The fresh seeds of your friend's marijuana plant do not germinate no matter what he does to them.} $$ $$ \text {abscisic acid } \quad \quad \text {e. Lateral buds are sprouting.} $$