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What is a hormone?
messenger molecules that are typically produced by one tissue to produce a response in other tissues
What is the function of ethylene?
it causes fruit to ripen and trees to form abscission layers between twigs and leaf petioles.
What kind of tropism is thigmotropism? Positive or Negative?
Just Positive
What are the five kinds of plant hormones?
Abscisic Acid, Auxins, Cytokinins, Ethylene, and Gibberellins
What is the function of gibberellins?
they encourage stem elongation and cell division in the shoots and leaves. They are also involved in fruit formation and seed germination.
What are short-day plants?
plants that require light for less than a specific amount of time. They are controlled by the length of night.
What is the function of abscisic acid?
it inhibits several other plant hormones which slows both cell growth and cell division
What are the three kinds of tropisms?
Phototropism, Gravitropism, and Thigmotropism
What are long-day plants?
What is the function of auxins?
they promote cell elongation and suppress cell division in the shoot. They also promote lateral root development.
What kind of tropism is phototropism? Positive or Negative?
Both.
Positive: Plant stems grow toward the light
Negative: Roots bend away from the light
What are day-neutral plants?
Plants that rely on other factors that aren't day or night.
What is the function of cytokinins?
they promote cell division and work with auxins in controlling the growth and division of cells. They also promote lateral bud development.
What kind of tropism is gravitropism? Positive or Negative?
Both.
Positive: the radicle grows toward the pull of gravity
Negative: grows against the pull of gravity