Answer the following questions briefly:
State two effects of the smog observed in major cities.
Two effects of smog observed in major cities:
1) Decreases visibility which disrupts the smooth movement of traffic.
2) It causes health problems such as bronchitis and asthma, dry eyes etc.
Given below is a set of terms arranged in a logical sequence, representing a process or a function. Of these, one term is incorrect. Identify the incorrect term and replace it with the correct term. One has been done for you as an example.
E.g. Pollen grain → Exine → Staminal tube →Male gametes → Micropyle
Incorrect term – Staminal tube.
Correct term – Pollen tube
Sensory nerve → Dorsal root ganglion → Sensory neuron → Motor neuron →Receptor
Answer the following questions briefly:
Mention two reasons for the high birth rate in India.
Differentiate between the following on the basis of what is given in brackets:
Biofertiliser and chemical fertiliser (an example of each)
Differentiate between the following on the basis of what is given in brackets:
Karyokinesis and cytokinesis (explain the terms)
Answer the following questions briefly:
Name any two vaccines and mention the diseases against which they give immunity.
Differentiate between the following on the basis of what is given in brackets:
Mitosis and meiosis (number of daughter cells formed)
Differentiate between the following on the basis of what is given in brackets:
Pure and hybrid strains (definition)
Differentiate between the following on the basis of what is given in brackets:
WHO and Red Cross (any one function of each)
