biology 24.1

21
CH. 24-1 REPRODUCTION WITH CONES AND FLOWERS Ch. 24 Reproduction of Seed Plants

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Page 1: Biology 24.1

CH. 24-1 REPRODUCTION WITH CONES AND FLOWERSCh. 24 Reproduction of Seed Plants

Page 2: Biology 24.1

Pollen Cone

Cone in gymnosperms that produces male gametophytes in the form of pollen grains

Page 3: Biology 24.1

Seed Cone

Cone that produces female gametophytes

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Ovule

Structure in seed cones in which female gametophytes develop

Page 5: Biology 24.1

Pollen Tube

Structure grown y a pollen grain; contains two haploid sperm nuclei

Page 6: Biology 24.1

Sepal

Outermost circle of flower parts that encloses a bud before it opens and protects the flower while it is developing

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Petal

Brightly colored structure just inside the sepals; attracts insects and other pollinators to a flower

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Stamen

Male part of the flower; made up of an anther and a filament

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Filament

Long thin structure that supports an anther

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Anther

Flower structure in which haploid male gametophytes are produced

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Carpel

Innermost part of a flower that produces the female gametophytes

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Ovary

In a flower structure that contains one or more ovules from which female gametophytes are produced

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Style

Narrow stalk of the carpel in a flower

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Stigma

Sticky portion at the top of the style where pollen grains frequently land

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Embryo Sac

Female gametophyte within the ovule of a flowering plant

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Endosperm

Food-rich tissue that nourishes a seedling as it grows

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Double Fertilization

Fertilization in angiosperms, in which two distinct fertilization events take place between the male and female gametophytes.

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Key Concepts

Reproduction in gymnosperms takes place in cones, which are produced by a mature sporophyte plant.

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Key Concepts

Flowers are reproductive organs that are composed of four kinds of specialized leaves: sepals, petals, stamens, and carples.

Page 20: Biology 24.1

Key Concepts

Reproduction in angiosperms takes place within the flower. Following pollination and fertilization, the seeds develop inside protective structures.

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Key Concepts

Most gymnosperms and some angiosperms are wind pollinated whereas most angiosperms pollinated by animals