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प्रश्न
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow : 
What is meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
उत्तर
Positive tropism is movement or growth towards a stiumulus where ax negativfe tropism is movement or growth away from a stimulus.
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संबंधित प्रश्न
Formalin, Iodine, DDT, Lime
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
Mention the exact location of the following :
Thylakoids
Name the following:
The products that are formed as a result of photosynthesis.
Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is
Name the following:
The organisms that can be called "natural purifiers" of the air.
Name the following:
The tissue that transports manufactured type of starch from leaves to all parts of the plants.
Respiration is said to be the reversal of photosynthesis.
Complete the following sentence with appropriate word:
One of the products of ______of water is oxygen.
Complete the following sentence with appropriate word:
AIIP stands for ____________.
Complete the following sentence with appropriate word:
Xanthophyll is ______ coloured pigment.
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’.
| Column I | Column II | ||
| (i) | Grana | (a) | Decomposers |
| (ii) | Autotrophs | (b) | Light reaction |
| (iii) | By-products of photosynthesis | (c) | Animals |
| (iv) | Photolysis | (d) | Oxygen |
| (v) | Bacteria and fungi | (e) | Stimulated by light |
| (vi) | Chloroplast | (f) | Power |
| (vii) | Oxygen and water | (g) | Raw material |
| (viii) | Sunlight | (h) | Machinery |
| (ix) | CO2 and water | (i) | End products |
| (x) | Glucose (sugar) | (j) | Workrooms |
| (xi) | Cells in the leaf | (k) | By-products. |
Fill in the blank by rearranging the letter in the bracket.
During photosynthesis plants releases _________ (egxyno).
Gas exchange takes place in plants using _____.
Planting trees help in decreasing global warming.
The green pigment present in the plant is ______.
State whether true or false. If false, correct the statement.
When the weather is hot, water evaporates lesser which is due to opening of stomata.
Assertion (A): All food chains begin with herbivores.
Reason (R): Green plants are heterotrophs.
Distinguish between the following pairs on the basis of the word indicated in the bracket ( ).
Producers and Consumers (organisms)
