Question

plz complete the chart quickly

Answer 1

Question

Complete the chart given below .

$\begin{tabular}{|c|c|c|}\cline{1-3} Movement &stimulus & \:\:Example\:\:\\ \cline{1-3} a) positive phototropism& & \\b) Negative geotropism & & \\c) Negative Phototropism & & \\d) Thigmonastic momement & & \\e) Nyctinasty movements & & \\\cline{1-3}\end{tabular}$

Answers

$\begin{tabular}{|c|c|c|}\cline{1-3} Movement& stimulus & Example\\ \cline{1-3}a) Positive phototropism & Light & Sunflower move its stem\\ & & and face towards the Sun \\ \cline{1-3}b) Negative geotropism & Gravity &growth of stem in the \\& & direction opposite to gravity\\ \cline{1-3} c) Negative phototropism & Light & Roots of plant tend to be \\& & away from light \\\cline{1-3} d) Thigmonastic movement & touch & Shutting of insectivorous \\& & plants , like pitcher plant \end{tabular}$

$\begin{tabular}{|c|c|c|}\cline{1-3} e) Nyctinasty movements \:\:\: & darkness & sleep movement of legume\;\:\:\:\\ & & leaves during night \\\cline{1-3} \end{tabular}$

Know more

What are tropic movement ?

Directional movements in response to stimulus .

Types of tropic movements

→ Phototropism : Directional movement in response to light

eg , positive phototropism : Shoot of plant

negative phototropism : root of plant

→ geotropism : Directional movement in response to gravity .

eg, positive geotropism : roots

negative geotropism : shoots

→ Hydrotropism : directional movement in response to water

eg, roots move towards water showing positive hydrotropsim.

→ Thigmotropism : Directional movement in response to  touch

eg, Movement of tendrils that tends to stay away from support.

→ Chemotropism : Directional movement in response to chemical .

eg , formation of pollen tube towards the ovule showing positive chemotropism.

What are Nastic movements ?

Non directional movements in response to stimulus .

Types of Nastic movements

→ Photonasty : non directional movement with stimulus light

eg , opening and closing of petals of flowers like dandelion and moonflower in response to light .

→ Seismonastic : non directional movement in response to contact or shock

eg, Leaves of mimosa pudica plant  .

→ Nyctinastic : non directional movement in response to light and temperature variation .

eg , Leguminous plants

→ Thigmonasty : non directional movement in response  to Touch

eg, insectivorous plants which close their lid when any prey comes in contact.