Carbon Dioxide Enters into the Leaves Through Tiny Pores Present on the Surface Of the Leaf Called - Science and Technology 2


Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
(a) chlorophyll
(b) chloroplast
(c) stomata
(d) epidermis



Carbon dioxide enters the leaves through tiny pores present on the surface of the leaf called stomata.

  Is there an error in this question or solution?
2014-2015 (March)



State whether the statement is true or false:
Aquatic animals breathe at a slower rate than the terrestrial animals.

Given below are the end products of different reactions involving glucose.

Write the reaction number in front of the following:
(i) Anaerobic reaction =
(ii) Reaction in the human muscles =
(iii) Aerobic respiration =
(iv) Reaction in the plant cells =
(v) Reaction in the liver

Cellular respiration takes place in
(a) Lysosome
(b) Chlorophyll
(c) Mitochondria
(d) Ribosome

List the similarities and differences between aerobic and anaerobic respiration.

Tick the correct answer:

During heavy exercise, we get cramps in the legs due to the accumulation of

Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction − upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.

1) The air tubes of insects

2) Skeletal structures surrounding chest cavity

3) Muscular floor of chest cavity

4) Tiny pores on the surface of leaf

5) Small openings on the sides of the body of an insect

6) The respiratory organs of human beings

7) The openings through which we inhale

8)  An anaerobic organism

9) An organism with tracheal system

The mountaineers carry oxygen with them because:

The exchange of respiratory gases in the cells of plants occurs by the process of _______________

(a) Osmosis
(b) Diffusion
(c) Glycolysis
(d) exhalation

During the respiration of an organism A, 1 molecule of glucose produces 2 ATP molecules whereas in the respiration of another organism B, 1 molecule of glucose produces 38 ATP molecules.

(a) Which organism is undergoing aerobic respiration?
(b) Which organism is undergoing anaerobic respiration?
(c) Which type of organism, A or B, can convert glucose into alcohol?
(d) Name one organism which behaves like A.
(e) Name two organisms which behave like B.

There is a pair of bean-shaped organs P in the human body towards the back, just above the waist. A waste product Q formed by the decomposition of unused proteins in the liver is brought into organ P through blood by an artery R. The numerous tiny filters S present in organ P clean the dirty blood by removing the waste product Q. The clean blood goes into circulation through a vein T. The waste substance Q, other waste salts, and excess water form a yellowish liquid U which goes from organ P into a bag-like structure V through two tubes W. This liquid is then thrown out of the body through a tube X.
(a) What is (i) organ P, and (ii) waste substance Q?
(b) Name (i) artery R, and (ii) vein T.
(c) What are tiny filters S known as?
(d) Name (i) liquid U (ii) structure V (iii) tubes W, and (iv) tube X.

Choose the odd one out in the following groups of four items each:

Ethyl alcohol, Carbon dioxide, Starch, Oxygen

Choose the odd one out in the following groups of four items each:

Trachea, Ciliated epithelium, Mucous, Diffusion

Choose the odd one out in the following groups of four items each:

Hairy, Moist, Nostril, Vocal cord

Given below is an example of a certain structure and its special functional activity: 

"Kidney and excretion".

Fill in the blanks on a similar pattern.

Pleura and _____________.

Match the items in Column A with those in Column B.

Column A

Column B



Large surface area


Breathing movements




Complemental air



Extra inhalation

How is the respiratory passage kept free of dust particles?

Differentiate between the following pairs on the basis of the aspect given in the brackets.

Tidal volume and Residual volume (Quantity of air)

Given below is an overall chemical reaction of a certain process:

C6H12O6→LacticAcid+2ATP+Heat enengy

Name one tissue in which this reaction occur.

With regard to the respiratory system and the process of respiration in man, answer the following question :

Give the overall chemical equation to represent the process of respiration in humans.

List the organs of Human respiratory system. 

Rewrite the following statement by selecting the correct option. 
During respiration, ____________ gas is given out.

Why is respiration essential for life?

Name the organs that bring about respiration.

Choose the appropriate word from the brackets.
Air that enters through the nose passes into this tube.

Glycolysis process occurs in which part of the cell?

What is common between extensive network of blood vessels around walls of alveoli and in glomerulus of nephron?

The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y.

The function of KOH is to absorb ______.

Which is the correct sequence of air passage during inhalation?

Which of the following is an incorrect statement?

Which of the following equations is the summary of photosynthesis?

Name the energy currency in the living organisms. When and where is it produced?

Explain the three pathways of breakdown in living organisms.

Breathing is a process that

  1. provides O2 to the body.
  2. breaks down food to release energy.
  3. helps the body to get rid of CO2.
  4. produces water in the cells.

Which of the following gives the correct combination of functions of breathing?

Mark the following statement as True or False. Correct the false statement.

Insects have spiracles on the lower surface of the body.

The exchange of gases in the leaves takes place with the help of __________.

On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.


      Forgot password?
Use app×