Ptolemy's model was Geocentric. This means that it put the earth at the center of the solar system, instead of the sun, with all celestial objects orbiting it. The first person to prove the validity of the heliocentric theory was Nicolaus Copernicus.
Answer:
this is rose plant . it's easy . what doubt you have in this question?
Explanation:
the rose is pink in color. it has green leaves with spikes. generally people give red roses on 14 feb because that day was valentine's day.
<u>Answer:</u>
<em>A constant is something whose value cannot be changed and is used for comparison purpose. </em>
<u>Explanation:</u>
The controlled variable is a type of variable whose value is kept constant during the experiment to get the desired or expected result. The difference between constant and a control variable is that the constant can never be changed.
However, the value of control variable can be changed but is kept constant with a purpose in an experiment to get the data. The controlled variable in a battery can be the multi meter that should be used for all the batteries.
Enzymes split the DNA molecule into two rails and then transport corresponding nitrogen bases to each rail. I think this is the answer
