In plants, A growth in response to stimulus is called a Question 1 options: roots hormone tropism succession Question 2 (18 points) The most crucial plant tropisms are Question 2 options: light, touch, hunger light, gravity, hunger light, gravity, water light, touch, water Question 3 (18 points) Responses to _________ are called Phototropism. Question 3 options: light water gravity touch Question 4 (18 points) Responses to gravity are called Question 4 options: Phototropism Hydrotropism Geotropism Thigmotropism Question 5 (18 points) Roots show: Question 5 options: positive geotropism, positive phototropism positive geotropism, positive hydrotropism negative phototropism, negative hydrotropism positive phototropism, negative geotropism Question 6 (10 points) The plant growth hormone that encourages growth in plants is called Question 6 options: Auxin Eucentrin Gibberelins Insulin