During the refraction of light wavelength and speed change. Frequency is always a constant quantity.
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Animal tissues are categorised into four basic types on the basis of their structure and functions. The four basic types of tissues are epithelial connective, muscular and nervous tissue.
A mixture which has uniform composition throughout, i.e., without any clear boundary of separation is known as homogeneous mixture.
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i. autotrophs ii. heterotrophs iii. saprotrophs iv. chemo-autotrophs
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