Biology
The diagram of an apparatus given below demonstrates a particular process in plants. Study the same and answer the questions that follow:
(i) Name the apparatus.
(ii) Which phenomenon is demonstrated by this apparatus?
(iii) Explain the phenomenon mentioned in (ii) above.
(iv) State two limitations of using this apparatus.
(v) What is the importance of the air bubble in the experiment?
(vi) Name the structures in a plant through which the above process takes place.
Answer
(i) Ganong's Potometer
(ii) Transpiration
(iii) It is the loss of water as water vapour from the aerial parts of the plant.
(iv) Two limitations of using Ganong's Potometer are:
- Introducing the air bubble is not very easy.
- The twig may not remain fully alive for a long time.
(v) The movement of the air bubble gives the volume of water lost in a given time.
(vi) Stomata, Lenticels, Cuticle.
Related Questions
(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions:
The sensory cells that helps in hearing.
The part that is responsible for static balance of the body.
The membrane covered opening that connects the middle ear to the inner ear.
The fluid present in the middle chamber of cochlea.
The structure that maintains dynamic equilibrium of the body.
Given below is the outline of the human body showing the important glands:
(i) Name the glands marked 1 to 4.
(ii) Name the hormone secreted by part 2. Give one important function of this hormone.
(iii) Name the endocrine part of the part numbered 3.
(iv) Why is the part labelled 1 called the master gland? Which part of the forebrain controls the gland labelled 1?
(v) Name the gland that secretes the 'emergency hormone'.
Give the Biological / technical term for the following:
(i) Complete stoppage of menstrual cycle in females.
(ii) Pigment providing colour to urine.
(iii) The vein which drains the blood from the intestine to the liver.
(iv) The canal through which the testes descend into the scrotum just before the birth of a male baby.
(v) The process causing an undesirable change in the environment.
(vi) The removal of nitrogenous wastes from the body.
(vii) The repeating components of each DNA strand lengthwise.
(viii) An alteration in the genetic material that can be inherited.
(ix) The process of uptake of mineral ions against the concentration gradient using energy from the cell.
(x) Blood vessels carrying blood to the left atrium.
Differentiate between the following pairs on the basis of what is mentioned within brackets:
LUBB and DUP (names of the valves whose closure produce the sound)