Jordan Ellerby
BI112
Dr. Ikenga
April 7, 2015
Chapter 39 Test Yourself 1. Where do the pollen grains of flowering plants develop? a. In the anthers of the flower b. In the carpels of a flower c. While being dispersed by wind, water, or animals d. Within ovules e. Within pistils 2. Where do mature male gametophytes of flowering plants primarily develop? f. In the anthers of the flower g. In the carpels of a flower h. While being dispersed by wind, water, or animals i. Within ovules j. On the surfaces of leaves 3. Where do you find female gametophytes of a flowering plant? k. In the anthers of a flower l. At the stigma of a pistil m. In the style n. Within ovules in a flower’s ovary o. In the structures that are dispersed by wind, water, or animals 4. How does double fertilization occur in flowering plants? p. The two sperm in a pollen tube fertilize the two egg cells present in each female gametophyte q. 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. r. Two sperm, one contributed by each of two different pollen tubes, fertilizes the two egg cells in single female gametophyte. s. Two sperm contributed by separated pollen tubes enter a single female gametophyte; one of the sperm fertilizes the egg cell; the other fertilizes the central cell. 5. A seed is t. An embryo produced by fertilization of an egg, which is protected by a seed coat. u. A structure that germinates to form a seedling under the right conditions v. An embryo produced by parthenogenesis that is enclosed by a seed coat w. All the above x. None of the above 6. What is most likely chemical composition of the chemical stimulus of flowering that is produced by leaves and transported to the shoot apical meristem? y. The hormone auxin z. The protein STM {. The carbohydrate callose |. The mineral ion K+ }. None of the listed choices 7. How many whorls of organs occur in complete flowers ~. Two . Four . Six . Eight . Ten 8. If an ovary contains eight ovules how many seeds could potentially result if pollen tubes reach all eight all eight ovules . One . Four . Eight . More than 20 . None if the listed choices 9. What function(s) does the polysaccharide callose have in the reproduction of flowering plants? . Callose forms a coat that isolates young embryos during their early development . Callose forms a coat that isolates groups of four microscopes during their early development into pollen grains . Callose helps to pattern the sculptured sporopollenin walls of pollen grains . All above of the above . None of the above 10. From what structure does a fruit pericarp primarily develop? . The style . A stamen filament . The ovary wall . A group of fused sepals . The stigma