Chapter 40

Where do the pollen grains of flowering plants develop? a. in the anthers of a flower b. in the carpels of a flower c. while being dispersed by wind, water, or animals d. within ovules e. within pistils

Where do mature male gametophytes of flowering plants primarily develop? a. in the anthers of a flower b. in the carpels of a flower c. while being dispersed by wind, water, or animals d. within ovules e. on the surfaces of leaves

Where would you find female gametophytes of a flowering plant? a. in the anthers of a flower b. at the stigma of a pistil c. in the style d. within ovules in a flower’s ovary e. in structures that are dispersed by wind, water, or animals

How does double fertilization occur in flowering plants? a. The two sperm in a pollen tube fertilize the two egg cells present in each female gametophyte. b. One of the two sperm in a pollen tube fertilizes the single egg in a female gametophyte, and the other fuses with the two nuclei present in the central cell. c. Two sperm, one contributed by each of two different pollen tubes, fertilize the two egg cells in a single female gametophyte. d. Two sperm contributed by separate pollen tubes enter a single female gametophyte; one of the sperm fertilizes the egg cell, and the other fertilizes the central cell. e. None of the above is correct.

A seed is a. an embryo produced by the fertilization of an egg, which is protected by a seed coat. b. a structure that germinates to form a seedling under the right conditions. c. an embryo produced by parthenogenesis that is enclosed by a seed coat. d. all of the above. e. none of the above.

What is the chemical stimulus of flowering that is produced by leaves and transported to the shoot apical meristem? a. the hormone auxin b. the protein STM c. the carbohydrate callose d. the mineral ion \(\mathrm{K}^{+}\) e. None of the above is correct.

How many whorls of organs occur in complete flowers? a. \(\mathrm{IWO}\) b. four c. six d. eight e. ten

If an ovary contains eight ovules, how many seeds could potentially result if pollen tubes reach all eight ovules? a. one b. four c. eight d. more than 20 e. None of the above is correct.

What function(s) does the carbohydrate callose have in the reproduction of flowering plants? a. Callose forms a coat that isolates young embryos during their early development. b. Callose forms a coat that isolates groups of four microspores during their early development into pollen grains. c. Callose helps to form the patterns on the sporopollenin walls of pollen grains. d. All of the above are functions of callose. e. None of the above is a function of callose.

From what structure does a fruit pericarp primarily develop? a. the style b. a stamen filament c. the ovary wall d. a group of fused sepals e. the stigma