Answer:
The independent variable is plotted on the x-axis. This is the variable that is being manipulated or controlled.
I shall draw this out as these tend to be answered best visually
The variable you can change in an experiment is ( B ) A dependent variable
The amount of work done by the force of gravity on the ball is 4.41 Joules.
<u>Given the following data:</u>
- Displacement = 2.5 meters.
<u>Scientific data:</u>
- Acceleration due to gravity = 9.8
.
To calculate the amount of work done by the force of gravity on the ball:
<h3>How to calculate work done.</h3>
In Science, work done is calculated by multiplying force and the height or displacement experienced by an object.
Mathematically, work done is given by the formula:
Substituting the given parameters into the formula, we have;
Work done = 4.41 Joules.
Read more on work done here: brainly.com/question/22599382
Answer: The lac Y and lac Z genes are turned off when lactose is present. Is a false statement about E coli and the lac operon. Therefore the correct option is A.
Explanation:
Escherichia coli is an enteric bacteria that makes use of lactose operon (or lac operon) for its lactose metabolism. The lac operon is made up of three genes which includes lacZ, lacY and Lac A. These genes are expressed only when lactose is present and glucose is absent. Also the lac repressor acts as a lactose sensor while the catabolite activation protein (CAP) acts as a glucose sensor. They help in turning on and off the genes with respect to lactose and glucose levels.
The lac Y and lac Z genes are turned off (not expressed) when glucose is present and lactose absent, but are expressed when glucose is absent and lactose present. Therefore option A is a false statement.
