. Advanced biology. Biology; Physiology; Reproduction. 274 REPRODUCTION OF HIGHER PLANTS III. Shake some pollen from the anther on to a glass slide. Mount under the microscope. A. How many cells make up each pollen grain? B. Describe the shape, color, and structure of pollen. C. Draw and label several pollen grains enlarged ten times. IV. Cut a thin cross section of the ovary of the pistil. Examine it with a hand lens. A. The seedlike structures are the ovules. Note that the ovules are attached to the ovary wall and are not loose in the ovary. The part of the ovary wall to which the ovules are
. Advanced biology. Biology; Physiology; Reproduction. 274 REPRODUCTION OF HIGHER PLANTS III. Shake some pollen from the anther on to a glass slide. Mount under the microscope. A. How many cells make up each pollen grain? B. Describe the shape, color, and structure of pollen. C. Draw and label several pollen grains enlarged ten times. IV. Cut a thin cross section of the ovary of the pistil. Examine it with a hand lens. A. The seedlike structures are the ovules. Note that the ovules are attached to the ovary wall and are not loose in the ovary. The part of the ovary wall to which the ovules are attached is called the placenta. V. Place an ovule on a glass slide. Cover it with a cover glass and crush it by carefully pressing down with the cover glass. A. Does an ovule consist of one or more cells? Note a central structure. This is the embryo sac containing the egg B. cell. C. sac. Draw the outline of an ovule showing the position of the embryo Structure of the flower. The flower consists of a calyx made up of sepals and a corolla made up of petals. While the essential organs. )1S ;til The essential organs for the reproduction of higher plants are the stamens and pistils. Accessory organs are the sepals and petals. The sepals enfold the entire flower, forming a bud. Thus the organs are protected while they are ripening. The petals are fre- quently showy and attract insects. This may result in pollination. The stamens produce pollen and the pistil produces ovules. are rlpen•^ ing, they are pro- tected from rain, insects, and certain mechanical injuries by the tightly en- folding calyx and corolla. The whole ther IstxxmeTL structure com- prises the bud. As the essential organs ripen, the calyx and corolla unfold and expose the matured pistils and stamens. st^le/ ovarr^ amentj ccl. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly
Size: 1585px × 1575px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubje, booksubjectphysiology
