taxes tropism and kinesis

Question 1

whats a taxis

Answer 1

moving towards or away from a favourable stimulus

Question 2

whats kinesis

Answer 2

increase in random movements in favourable environments

Question 3

whats a tropism

Answer 3

growth movement of a plant towards or away from a stimulus

Question 4

what are hormones

Answer 4

proteins carried by blood. slow. affect different parts of the body widespread response long lasting

Question 5

what are chemical mediators

Answer 5

released from mammalian cells- effect cells in the immediate vicinity
spread directly by diffusion

Question 6

explain IAA responding to light

Answer 6

used for photosyn
IAA made in cells in tip of the shoot
transported down shoot on both sides
light causes IAA to move to shaded side of the shoot
stimulates cells to elongate- shaded side grows faster bends towards light

Question 7

explain IAA responding to gravity

Answer 7

IAA made in cells in root tip
moves to lower side of the root
inhibits growth on the lower side
upper side grows more and makes roots grow down