BIOL Exam 3 Chp 38

True or false? The endosperm in a seed develops into the embryo.

False The endosperm in a seed is not the embryo, but the food supply for the embryo.

How is fertilization in flowering plants different from fertilization in other plant groups? Two sperm nuclei fuse with a polar nucleus to form a diploid zygote. One sperm nucleus fuses with the egg to form a diploid zygote, whereas the other sperm nucleus fuses with a polar nucleus to form a diploid cell that forms a nutrient-rich tissue. One sperm nucleus fuses with the egg to form a diploid zygote. One sperm nucleus fuses with the egg to form a diploid zygote, whereas the other sperm nucleus fuses with two polar nuclei to form a cell that develops into endosperm.

One sperm nucleus fuses with the egg to form a diploid zygote, whereas the other sperm nucleus fuses with two polar nuclei to form a cell that develops into endosperm.

Which part of a plant attracts pollinators? Carpel Sepal Stamen Petals

Petals

Which term describes the male gametophytes of flowering plants? Pollen grains Microsporocytes Micropyle Megaspores

Pollen grains Pollen grains are the male gametophytes of flowering plants; they contain a generative cell that develops into sperm.

Which structure formed by the male gametophyte allows sperm to reach the ovary of a flowering plant? Pollen tube Micropyle Stigma Anther

Pollen tube The pollen tube is formed after a pollen grain is transferred to a receptive stigma and germinates, forming a tube that grows down through the style to the ovary of a flowering plant.

Which process involves the transfer of pollen grains from an anther to a stigma? Germination Gametogenesis Fertilization Pollination

Pollination Pollination is the transfer of pollen grains from an anther to a stigma.

Which of the following statements about seed formation in a flowering plant is true? The terminal cell formed from mitosis of the zygote divides to form a row of single cells that eventually forms the embryo. Hypocotyls are the seed leaves of the embryonic plant. The swellings that develop into cotyledons are located at the end of the embryo on top of the row of single cells. The basal cell formed from mitosis of the zygote divides to form a globular mass that is the route for nutrient transfer to the developing embryo.

The swellings that develop into cotyledons are located at the end of the embryo on top of the row of single cells.

Fruits evolved primarily as structures specialized to _____. disperse seeds provide a source of food to the plant's embryo protect pollen provide food for humans protect seeds

disperse seeds Fruits evolved as seed-dispersing structures.

What is endosperm? a. the male portion of a flowering plant b. the leaves that are a part of the embryo c. tissue that develops into a protective seed coat surrounding the embryo d. the female portion of a flowering plant e. via cotyledons, a source of food for the embryo

via cotyledons, a source of food for the embryo The triploid endosperm is a source of nourishment for the embryo.