ICSE 2018: A pea plant which is homozygous for Green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]

ICSE 2018:

Q. A pea plant which is homozygous for Green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]. Answer the following questions: [5 marks] 

(i) Give the phenotype and genotype of the F1 generation. Which type of pollination has occurred to produce F1 generation? 

(ii) Write the phenotypic ratio of the F1 generation. 

(iii) Write the possible combination of the gametes that can be obtained if two F1 hybrid plants are crossed. 

(iv) State Mendel’s law of ‘Segregation of Gametes’. 

(v) What is the scientific name of the plant which Mendel used for this experiment on inheritance?

Solution:

ICSE 2018 : The diagram below represents a process in plants. The setup was placed in bright sunlight.

ICSE 2018 

Q. The diagram below represents a process in plants. [5 marks]  

The setup was placed in bright sunlight. Answer the following questions:

(i) Name the physiological process depicted in the diagram. Why was oil added to the water? 

(ii) When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant? Give a suitable reason for your answer. 

(iii) What happens to the level of water when this setup is placed in: 

      1. Humid conditions?      2. Windy conditions? 

(iv) Mention any three adaptations found in plants to overcome the process mentioned in (i). 

(v) Explain the term ‘Guttation’

Solution:

ICSE 2018: Given below is a diagram of a human blood smear. Study the diagram and answer the questions that follow

ICSE 2018

Q. Given below is a diagram of a human blood smear. Study the diagram and answer the questions that follow: [5 marks]

(i) Name the compound numbered ‘1’ to ‘4’. 

(ii) Mention two structural differences between the parts ‘1’ and ‘2’. 

(iii) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood. 

(iv) What is the average lifespan of the component numbered ‘1’? 

(v) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain

Solution: