Chapter 27

A flower's ___ has one or more ovaries in which eggs develop, fertilization occurs, and seeds mature. a. pollen sac b. carpel c. receptacle d. sepal

Name one reward that a pollinator may receive in return for a visit to a flower of a coevolved plant.

Meiosis of cells in pollen sacs forms haploid _____, a. megaspores b. microspores c. stamens d. sporophytes

Meiosis in an ovule produces ____ megaspores. a. two b. four c. six d. eight

Seeds are mature _____ fruits are mature ____. a. ovaries; ovules b. ovules; stamens c. ovules; ovaries d. stamens; ovaries

The seed coat forms from the ____. a. integuments b. coleoptile c. endosperm d. sepals

A new plant forms from a stem that broke off of the parent plant. This is an example of ___> a. parthenogenesis b. exocytosis c. vegetative reproduction d. nodal growth

Cotyledons develop as part of ____. a. carpels b. accessory fruits c. embryo sporophytes d. petioles

Plant hormones _____. a. may have multiple effects b. are active in developing plant embryos c. are active in adult plants d. all of the above

_______ is the stimulus for phototropism. a. Red light b. Far-red light c. Green light d. Blue light

Sunlight resets biological clocks in plants by activating and inactivating ____. a. phototropins b. phytochromes c. photoperiodisms d. far-red light

Solar tracking is similar to ______. a. phototropism b. gravitropism c. photoperiodism d. thigmotropism

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

Match the observation with the hormone.. ____ethylene ____ cytokinin ____ auxin ____gibberellin ____ abscisic acid a. Your cabbage plants bolt (they form elongated flowering stalks) b. The philodendron in your room is leaning toward the window. c. The last of your apples is getting really mushy. d. The seeds of your roommate's marijuana plant do not germinate no matter what he does to them. e. Lateral buds on your Ficus plant are sprouting branch shoots.

Match the terms with the most suitable description. ______ovule ______receptacle ______ double fertilization ______anther ______carpel ______mature female gametophyte ______mature male gametophyte a. pollen tube together with its contents b. embryo sac of seven cells, one with two nuclei c. starts out as cell mass in ovary; may become a seed d. stigma, style, and ovary e. pollen sacs inside f. base of floral shoot g. formation of zygote and first cell of endosperm