Which one of the following species of honey bee is an Italian species?

Why is organic matter important for crop production?

Suhasini's uncle was advised by his doctor to have an ultrasound scan of his abdomen. Her uncle did not know much about the details and significance of this test. He also felt that it was too expensive and thought of postponing it. When Suhasini learnt about her uncle's problems,she immediately decided to do something about it. She took the help of her family,friends and neighbours and arranged for the cost of the test. She also told her uncle that an ultrasound scan of his abdomen would enable the doctors to know of the condition of his kidneys without causing any (test related) harm to him. This test was expensive because of its set-up that needed an expensive apparatus.
Her uncle was convinced and had the required ultrasound scan of his abdomen done. The resulting information greatly helped his doctor to treat him well.
$(a)$ What according to you,are the values displayed by Suhasini and her family,friends and neighbours to help her uncle?
$(b)$ What type of wave is used in an ultrasound scan?

Find out the wrong statement from the following:

Sid went to market to buy foodgrains for his home and on returning when his mother found the grains discoloured and of low and poor quality,she returned them back to the vendor. The vendor told Sid's mother that it was due to the storage loss of the grains that resulted in their poor quality and gave her the good quality grains.
$(a)$ What kind of qualities are shown by Sid's mother?
$(b)$ What could be the control measures to prevent this storage loss?

$(i)$ Name the three varieties of pesticides used.
$(ii)$ Write the problems related to the excess use of pesticides.