Download App

Control and Coordination — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceControl and Coordination3 Marks
Question
How does phototropism occur in plants?
✓

Answer

The growth movement in plants in response to light stimulus is known as phototropism. The shoots show positive phototropism and the roots show negative phototropism. This means that the shoots bend towards the source of light whereas the roots bend away from the light source.
For Example: The flower head of sunflower is positively phototropic and hence it moves from east to west along with the sun.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Questions]" from Control and Coordination→Control and Coordination — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

What are the differences between the transport of materials in xylem and phloem?
→
What is nuclear fusion? Explain with an example. Write the equation of the reaction involved.
→
An object 20cm from a spherical mirror gives rise to a virtual image 15cm behind the mirror. Determine the magnification of the image and the type of mirror used.
→
A. In a family of four individuals, the father possessed long ears and the mother possessed short ears. If the parents had pure dominant and recessive traits respectively, then calculate the ratio of genetic makeup of F2 generation. Show a suitable cross.(2)
B. If father had short ears and the mother had long ears, explain what effect it will have on the ratio of genetic makeup in F2 generation. (1)
→
  1. Name one antacid. How does it help to relieve indigestion in stomach?
  2. A farmer treats the soil with quicklime or calcium carbonate. What is the nature of soil? Why does the farmer treat the soil with quicklime?
→
  1. Write the names of those parts of a flower which serve the same function as the following do in the animals:
  1. Testis.
  2. Sperm.
  3. Ovary.
  4. Egg.
  1. State the function of flowers in the flowering plants.
→
Name five places in India where nuclear power plants are located.
→
A very small population of a species faces a greater threat of extinction than a larger population. Provide a suitable genetic explanation.
→
What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
→
Explain the formation of a chlorine molecule on the basis of electronic theory of valency.
→