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Life Science

Chapter 13 Vocabulary

TermDefinition
abscisic acid A plant hormone.
auxin A plant hormone.
cytokinins A plant hormone.
ethylene A plant hormone.
fertilization The process of the DNA of the sperm combining with the egg.
flower base The bottom of a flower to which the sepals, petals, etc., attach.
fruit The seed-containing mature ovary of a dicot.
gamete phase The plant phase in which the plant lives as a gamete-producing plant.
gibberellin A plant hormone.
grafting A stem from one tree being placed into a notch cut into the trunk of another tree.
gravitropism The growth of a plant against gravity.
nastic movements Plant movements caused by changes in turgor pressure.
nectar A sweet-smelling, sugary substance that attracts insects and causes pollen to stick to them for the purpose of improved pollination.
petals The usually brightly colored parts of a flower.
photoperiodism The process of a plant responding to the amount of light it receives.
phototropism The growth of plants toward a light source.
pistils The female reproductive structure; they form eggs in the ovary.
pollen The male reproductive structure that contains the male gametophyte and sperm.
pollination The transfer of pollen from the male part of the plant to the female part.
pollinators Insects and other animals that pollinate flowers.
sepals The outer layer of structures attached to the flower base.
sporophyte A plant that produces spores.
sporophyte phase The plant phase in which the plant lives as a spore-producing plant.
stamens The male reproductive structure; they make pollen.
stem cutting A common way to grow many of the same types of plant starting from one plant.
stolons Shoots sent out from the main plant along the top of the ground.
transpiration The loss of water from the leaves of a plant.
tropism The directional movement of a plant in response to some type of stimulus; controlled by hormones.
turgor pressure Pressure inside of a cell due to water.
vegetative reproduction The formation of a new plant from a part of a plant that does not normally reproduce; a form of asexual reproduction.
Created by: kaisnead
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