An ovule with a protective coating, encasing a mature plant embryo and a nutrient source.
What is a Seed?
200
Plants that grow year after year.
What are Perennial Plants?
200
A fine dust that contains the sperm of seed-producing plants.
What is Pollen?
200
The process of cutting away a ring of inner and outer bark all the way around a tree trunk.
What is Girdling?
200
A growth response to gravity.
What is Gravitropism?
200
A growth response to light.
What is Phototropism?
300
Plants that live for two years.
What are Biennial plants?
300
The parts of a plant involved in reproduction (such as the flowers, fruits, and seeds).
What are Reproductive plant organs?
300
Flowers with both stamens and carpels.
What are perfect flowers?
300
Flowers with either stamens or carpels, but not both.
What are Imperfect flowers?
300
A growth response to touch.
What is Thigmotropism?
400
The parts of a plant that are not involved in reproduction (such as stems, roots, and leaves).
What are Vegetative organs?
400
Living vascular tissue that carries sugar and organic substances throughout a plant.
What is Phloem?
400
The transfer of pollen grains from the anther to the carpel in flowering plants.
What is Pollination?
400
A mixture of gravel, sand, silt, clay, and organic matter.
What is Loam?
400
The study of life processes in an organism.
What is Physiology?
500
Nonliving vascular tissue that carries water and dissolved minerals from the roots of a plant to its leaves.
What is Xylem?
500
The arrangement of leaves on the stem of a plant.
What is Leaf mosaic?
500
A fertilization process that requires two sperm to fuse with two other cells.
What is Double fertilization?
500
The phenomenon that occurs when individual molecules are so strongly attracted to each other that they tend to stay together, even when exposed to tension.
What is Cohesion?
500
A plant's response to a stimulus such that the direction of the response is preprogrammed and not dependent on the direction of the stimulus.