DRAW IT Draw and label the parts of a flower.

Some dioecious species have the XY genotype for male and XX for female. After double fertilization, what would be the genotypes of the embryos and endosperm nuclei?a. embryo XY/endosperm XXX or embryo XX/endosperm XXYb. embryo XX/endosperm XX or embryo XY/endosperm XYc. embryo XX/endosperm XXX or embryo XY/endosperm XYYd. embryo XX/endosperm XXX or embryo XY/endosperm XXY

In a species showing sporophytic incompatibility, which type(s) of pollen could successfully fertilize an S2S3 flower? (A) S1 pollen from an S1S3 flower (B) S2 or S3 pollen from an S2S3 flower (C) S3 pollen from an S1S1 flower (D) S1 pollen from an S1S1 flower

A small flower with green petals is most likelya. bee-pollinated.b. bird-pollinated.c. bat-pollinated.d. wind-pollinated.

What are the advantages and disadvantages of self-fertilization versus those of outcrossing?

Make a sketch of a simplified flower with all four organs, and indicate how the pattern of expression for just two genes (e.g., 'D' and 'E') could, hypothetically, regulate the development of each organ. Consider that what's important is whether a gene is on or off and that a structure can be specified when neither gene is expressed.

Most flowering plants can achieve pollination in several different ways. Those that produce pollen and carpels on the same plant may be self-pollinated, but they may also be cross-pollinated by insects or other pollinators. The cape gooseberry (Physalis peruviana) shown here is able to produce seed whether it is self- or cross-pollinated. Is one type of pollination better for reproductive success than the other?Considering the gooseberry flower shown here, what types of cues might attract bees to the plant? What type of rewards do bees seek?

Most flowering plants can achieve pollination in several different ways. Those that produce pollen and carpels on the same plant may be self-pollinated, but they may also be cross-pollinated by insects or other pollinators. The cape gooseberry (Physalis peruviana) shown here is able to produce seed whether it is self- or cross-pollinated. Is one type of pollination better for reproductive success than the other?Researchers conducted controlled experiments to test for effects of different types of pollination on cape gooseberry fruit size and seed production. The types of pollination included self-pollination, cross-pollination by bees, and manual cross-pollination (transferring pollen from one plant to another by hand). Results are shown in the graphs here. Compared to self-pollination, do bees have a significant impact on fruit mass? How about on seed formation?

Name two kinds of asexual reproduction among plants. Explain two advantages of asexual reproduction over sexual reproduction. What is the primary drawback of asexual reproduction?