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32 Cards in this Set
- Front
- Back
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Cones
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place where reproduction in gymnosperms take place.
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Mature Sporophyte
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produces cones in gymnosperms.
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Pollen Grain
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the male gametophytes of gymnosperms.
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Pollen Cone
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cone that produces male gametophytes.
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Seed Cones
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produce female gametophytes, have two ovules at the base of each scale, and generally much larger than pollen cones.
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2 Years
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the typicall length of the gymnosperms life cycle to complete
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Pollination Drop
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sticky material that ensures that pollen grains stay on the scales of a female cone.
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Pollen Tube
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structure grown by a pollen grain that's contains two sperm nuclei.
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Four leaves that compose a flower
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sepals, petals, stamens, carpels
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Pistil
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carpels that produce female gametophyte , fusion of carpels
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In the flower
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place where reproduction in angiosperms takes place.
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Megaspore
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inside the anther, each cell undergoes meiosis and produces these haploid cells
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Male gametophyte
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in angiosperms, the entire pollen grain is this.
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Embryo Sac
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the female gametophyte of an agiosperm, contained within the ovary.
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Wind
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most gymnosperms are pollinated by this.
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Animal
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most angiosperms are pollinated by this.
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Insects, birds, bats
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3 kinds of animals that pollinate angiosperms.
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Endosperm
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in angiosperms, the food-rich tissue that nourishes a seedling as it grows.
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Angiosperms
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2 fertilization events take place that is known as double fertilization in..
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Fruit
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any seed that is enclosed within its embryo wall.
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Seed Coat
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the outer layer of the seed that protects the embryo and its food supply.
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Dormancy
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period of time during which a plant embryo is alive but not growing.
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Moisture, Temperature
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2 environmental factors that can cause a seed to end dormancy amd germinate.
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Seed Germination
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early growth stage of the plant embryo.
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Water
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when a seed germinates it absorbs this.
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Vegetative Reproduction
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method of asexual reproduction used by many flowering plants.
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Plant Propagation
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makes many identical copies of plant or to produce offspring from seedless pants.
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Grafting
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when stems are used as scions.
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Budding
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process when buds are used as scions.
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Wheat, Rice, Corn
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3 crop plants that most people depend on for food supply.
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Wheat, Corn, Soybeans, Hay
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4 crops that 80 percent of the U.S. cropland is used to grow.
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Corn, Peanuts, Beans, Potatoes
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important crops that were unknown in Europe before they were introduced there from the Americas
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