Module 15 Vocab Flashcards
Nastic movement
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
Physiology
Fiz ee ah’ luh gee
The study of life processes in an organism
Pore spaces
Spaces in the soil that determine how much water and air the soil can hold
Loam
A mixture of gravel, sand, silt, clay, and organic matter
Cohesion
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
Translocation
The process by which organic substances move through the phloem of a plant
Hormones
Chemicals that circulate throughout multicellular organisms, regulating cellular processes by interacting with specifically targeted cells
Phototropism
Foh’ toh trohp’ z uhm
A growth response to light
Gravitropism
grav’ ih trohp’ iz uhm
A growth response to gravity
Thigmotropism
Thig’ muh trohp’ iz uhm
A growth response to touch
Perfect flowers
Flowers with both stamens and carpels
Imperfect flowers
Flowers with either stamens or carpels, but not both
Pollination
The transfer of pollen grains from the anther to the carpel in flowering plants
Double fertilization
A fertilization process that requires two sperm to fuse with two other cells
Seed
An ovule with a protective coating, encasing a mature plant embryo and a nutrient source
