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Are the following statement true or false? Give a reason in support of your answer. The rate of photosynthesis continues to rise as long as the intensity of light rises. - Biology

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प्रश्न

Are the following statement true or false? Give a reason in support of your answer.

The rate of photosynthesis continues to rise as long as the intensity of light rises.

विकल्प

  • True

  • False 

MCQ
सत्य या असत्य

उत्तर

This statement is false.

Explanation:

As the intensity of light increases, the rate of photosynthesis also increases, provided that the concentration of CO2 follows suit.

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अध्याय 6: Photosynthesis - Short answer type [पृष्ठ ७९]

APPEARS IN

सेलिना Concise Biology [English] Class 10 ICSE
अध्याय 6 Photosynthesis
Short answer type | Q 4.1 | पृष्ठ ७९

संबंधित प्रश्न

Give appropriate biological/technical terms for the following:

An apparatus that measures the rate of water uptake in a cut shoot due to transpiration.


Differentiate between the following pairs on the basis of what is indicated in the brackets.

Leaf and Liver [form in which glucose is stored]


Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :

(ii) Name the tropic movement shown by part 1. 


 State the main functions of the following:
Cytokinins


The figure given below represents the vertical section of a leaf.
( i) Name the parts labeled 1 to 5.
( ii ) What do the two arrows (dotted and solid) indicate in the daytime and at night?
( iii) Could you add one more arrow in the figure? If yes, what for?
( iv) How many leaf veins have been shown in this section?


An experiment was set up as shown in the figure alongside. Look at the figure and answer the following questions:
( i) What is the objective of this experiment?
( ii ) Which plant is used in this experiment?
( iii ) Which gas is evolved in this process?
( iv ) What will happen to the rate of evolution of this gas if a pinch of sodium
bicarbonate is added?
(v ) What will happen if the apparatus is kept in dark?


Fill in the blank:
______ is the process which replenishes the atmospheric oxygen which the animal life consumes in respiration.


Choose the correct answer:
The process of photosynthesis occurs by _________


Name the following:

The first form of food substance produced during photosynthesis. 


Identify the false statements and rewrite them correctly by changing the first or last word only.

Immediate product of photosynthesis is glucose.


Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. 

Explain briefly the role of the following structures in this process is Phloem tissue in the leaf veins.


What are the basic requirements of photosynthesis?


Complete the following food chain by writing the names of appropriate organisms in the blank:

Grass → __________ → Lion


The figure given below is for performing an experiment on photosynthesis.

Answer the following:
(i) What is the aim of this experiment?
(ii) Describe an experiment to show that light is necessary for photosynthesis.
(iii) What do you conclude from this experiment?
(iv) What is the role of light in photosynthesis?


Give technical term:

The form of energy is converted into chemical energy during photosynthesis.


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

A variegated leaf (one that has green as well as white patches) will only photosynthesize in the green areas.


Choose the correct option.

For fixation of 6 molecules of CO2 and formation of one molecule of glucose in Calvin cycle, requires


What will happen if we remove the fish from the aquarium and keep it (with green plants) in a dark place?


A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.

  1. Which aspect of photosynthesis is being tested in the above diagram?
  2. Why was the plant kept in the dark for 24 hours?
  3. After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.

Study the diagram given below and fill in the blanks with suitable words:

In order to prove that carbon dioxide is necessary for

(a) ______, a potted plant is placed in dark for 48 hours to (b) ______ the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) ______ from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) ______, whereas the part of the left outside turns (e) ______ in colour.


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