N an experiment the "control" is the group of people or object this is used to measure the effect of the variable. The "control" is the thing that does not change and is not the thing in question.
In an experiment the "variable" is the thing which is changed and manipulated by the experimenter. It is the effect of something,
Example: You want to test a drug. you get a group of 40 people. 20 people are given the pill, 20 people are not given the pill but a sugar pill. the people who have the pill is the "variable" and the people who dont have the pill is the "control".
The rain gauge is an instrument used by meteorologists to measure the amount of precipitation in a particular region in a particular amount of time.
The rain gauge is placed on the ground in order to collect the rain or the precipitation sample. The rain gauge is labelled with the quantities, which can be used to measure the amount of precipitation.
So, the correct answer is option (a). on or near the ground.
meaning of ADIP/O is fatty tissue part medical
The correct answer is actin. Microfilaments are made form a ball-shaped protein called actin. These actins are globular proteins who are the ones responsible for the formation of microfilaments. It is mostly found in the eukaryotic cells.
