The study of life processes in an organism.
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.
Spaces in the soil that determine how much water and air the soil can hold.
A mixture of gravel, sand, silt, clay and organic matter.
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.
The process by which organic substances move through the phloem of a plant.
Chemicals that circulate throughout multicellular organisms, regulating cellular processes by interacting with specifically targeted cells.
A growth response to light.
A growth response to gravity.
A growth response to touch.
flowers with both stamens and carpels.
Flowers with either stamens or carpels, but not both.
The transfer of pollen grains from the anther to the carpel in flowering plants.
A fertilization process that requires two sperm to fuse with two other cells.
An ovule with a protective coating, encasing a mature plant embryo and a nutrient source.
A mature ovary that contains a seed or seeds.