Question

Remove the carpel by cutting it free just below the base. Make a series of thin cross sections through the ovary. The ovary is hollow, and you can see nearly seberical bodies wide. What are these bodies? 7. Flowering plants are divided into two called moncats and sudicots. In the meantime, Table 15. lists significant differences between the two classes of Is your flower a monocolor codico Table 18.1 Monocots and Eudicots Monocots Eudicots One cotyledon Two cotyledons Flower parts in threes or Flower parts in foors or fives multiples of three or multiples of four or five Usually herbaceous Woody o herbaceous Usually parallel venation Usually net venation Scattered bundles in stem Vascular hurdles in a tieg Never woody Can be woody Life Cycle of Flowering Plants The life cycle of a flowering plant (Fig. 18.9) is like that of the pine tree except for these innovations . In angiosperms, the often brightly colored flower contains the pollen sacs and ovules. Locate these structures in Figure 18.9, and trace the life cycle of flowering plants from the sporophyte generation (the tree) through the various stages to the sporophyte generation once again. Pollination in flowering plants when pollen is delivered to the stigma of the carpelis sometimes accomplished by wind but more likely by the assistance of an animal pollinator. The pollinator acquires nutrients (c. nectan from the flower and inadvertantly collects pollen, which it takes to the next flower Notice that flowering plants, unlike gymnosperms, practice double fertilization. A mature contains two sperm; one fertilizes the egg, and the other joins with the two polar nuclei to form endosperm (3n), which serves as food for the developing embryo. • Also, flowering plants produce seeds the same as gymnosperm, but their seeds are enclosed within fruits. Fruits protect the seeds and aid in seed dispersal. Sometimes, animals eat the fruits, and after the di gestion process, the seeds are deposited far away from the parent plant. The term angiosperm means "covered seeds. The seeds of angiosperm are found in fruits, which develop from parts of the flower, particularly the ovary 220 Laboratory 18 Seed Plants

Answer 1

6. These nearly spherical bodies are ovules. After fertilisation, ovary turns into fruit and ovule turn ino seed.

7. Monocot flower - Flower parts in 3 or multiple of 3. Dicot flower - Flower parts in 4 or 5 or multiple of 4 or 5.