Long Answer TypeAn apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
i. Name the process being studied.
ii. Explain the process named above in ii.
iii. Why was the pot covered with a plastic sheet?
iv. Suggest a suitable control for this experiment.
v. Mention two ways in which this process is beneficial to plants.
vi. List three adaptations in plants to reduce the above mentioned process.
i. Transpiration
ii. The loss of water in the form of water vapour from the aerial parts of the plant body is known as transpiration.
iii. To prevent the escape of moisture into the atmosphere
.
iv. A bell jar without plant is a suitable control.
v. It brings cooling affect to the plant and develop suction force to pull the water to the top of plant.
vi. Three modifications are ;
a. Leaves become narrow.
b. Thick cuticle on the surface of leaves.
c. Leaves are modified into thorns or spine.
The diagrams given below are cross sections of blood vessels:
i. Identify the blood vessels A, B and C.
ii. Name the parts labelled 1 to 3.
iii. Name the type of blood that flows through A.
iv. Mention one structural difference between A and B.
v. In which of the above vessels does exchange of gases actually take place?
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow:
i. Label the parts numbered 1 to 4.
ii. Why does part ‘2’ have a striped appearance?
iii. What is the fluid that passes down ‘4’? Name the main nitrogenous waste
present in it.
iv. Mention the structural and functional units of kidneys.
v. Name the two major steps in the formation of the fluid mentioned in iii.
The diagram given below shows the male urinogenital system of a human being. Study the diagram and answer the questions that follow:
i. Label the parts numbered 1 to 8.
ii. Name the corresponding structure of part (4) in female reproductive system.
iii. What is the role of part 7? [5]
In a homozygous plant round seeds (R) are dominant over wrinkled seeds (r):
i. Draw a Punnett square to show the gametes and offspring when both the
plants have heterozygous round seeds (Rr).
ii. Mention the Phenotype and Genotype ratios of the offspring in F2 generation.
iii. Name the sex chromosomes in human males and females.
iv. Briefly explain the term ‘Mutation’.
v. What is the number of chromosomes in the gametes of human beings?
The diagram below represents the human heart in one phase of its function.
Study the diagram carefully and answer the questions that follow:
i. Name the phase.
ii. Which part of the heart is contracting in this phase? Give a reason to support your answer.
iii. Name the parts labelled 1 to 4.
iv. What type of blood flows through ‘2’?
v State the function of the part numbered ‘5’.
vi Name the membrane that covers the heart.
Switch
