(i) In the experimental set-up shown above in diagram (I) atmospheric air is being passed into lime water with a syringe while in diagram (II) air is being exhaled into lime water. The time taken for the lime water to turn milky in both the test tubes is different. Give reason. In the experimental set-up shown above in diagram (I) atmospheric air is being passed into lime water with a syringe while in diagram (II) air is being exhaled into lime water (ii) Draw the diagram of an open stomatal pore and label (I) Guard cells, and (II) Chloroplast on it. Mention two functions performed by stomata.

Question

(i) In the experimental set-up shown above in diagram (I) atmospheric air is being passed into lime water with a syringe while in diagram (II) air is being exhaled into lime water. The time taken for the lime water to turn milky in both the test tubes is different. Give reason.  In the experimental set-up shown above in diagram (I) atmospheric air is being passed into lime water with a syringe while in diagram (II) air is being exhaled into lime water  (ii) Draw the diagram of an open stomatal pore and label (I) Guard cells, and  (II) Chloroplast on it. Mention two functions performed by stomata.

Flash Institute · Accepted Answer

(i) In set up (I) lime water turns milky in more time as compared to set up (II) because the air we exhaled contains high percentage of CO₂ as compared to atmospheric air.
(ii) Label diagram of StomataFunction of Stomata

Gas exchange: Stomata allow carbon dioxide to enter the leaf for photosynthesis and oxygen to exit.
Transpiration: They help in the loss of excess water vapor from the plant through evaporation.

Question

Answer

💡 Some Related Questions

(a) Write the function of the following in the human alimentary canal:

Saliva

HCI in the stomach

Bile juice

Villi

(b) Write one function for each of the following enzymes:

Pepsin

Lipase

What causes the movement of food inside the alimentary canal in human beings?

Name an enzyme present in pancreatic juice.

(A) Write the correct sequence of steps followed during journey of oxygen rich blood from lungs to various organs of human body. (B) What happens when the system of blood vessels develop a leak?

(a) Why is there a difference in the rate of breathing between aquatic organisms and terrestrial organisms? Explain. (b) Draw a diagram of the human respiratory system and label it – the pharynx, trachea, lungs, diaphragm and alveolar sac on it.

(a) Why is nutrition necessary for the human body? (CBSE 2020)
(b) What causes the movement of food inside the alimentary canal?
(c) Why is the small intestine in herbivores longer than in carnivores?
(d) What will happen if mucus is not secreted by the gastric glands?

(a) Name the organs that form the excretory system in human beings. (b) Describe in brief how urine is produced in the human body.

(a) Describe the structure and function of the basic filtering unit of the kidney. (b) List two factors on which the reabsorption of water from urine depends.

(a) “Blood circulation in fishes is different from the blood circulation in human beings”. Justify the statement.
(b) Describe “blood circulation” in human beings.

Question

Answer

💡 Some Related Questions

Flash Education