Give reason for the following
Sunlight is not always required for the working of solar cell.

Give reason for the following Chlamydomonas is motile.

Name any two materials used for making of solar cells.

Give reasons for the following: Graphite is used as an electrode in the dry cell.

……is used in making solar cell

Give reason for the following: In pteriodophytes, one cell consitute the meristem.

Give appropriate reason for the following statement with an example- While making of an alloy the percentage composition of each metal, non-metal and element is always fixed.

Give the reasons for the following statements : Receiver of the stethoscope is always placed on the lef side off the chest.

Give reason for the following Cell wall of red algae protects from drying or freezing on their exposure to air.

Number of mitotic division required for the formation of 128 cells