The carbon cycle ensures that living things have a continual source of hydrogen. The carbon cycle helps transport nutrients in bodies of water.
Answer:
A: Cumulative recorder
Explanation:
B. F. Skinner was a psychologist, author, behaviorist and inventor of Operant conditioning chamber and Cumulative recorder. The purpose of cumulative recorder was to study the rate of operant conditioning. It is a process in which behavior of an organism is modified or an organism is conditioned to perform a specific behavior through giving punishment or reward.
For example: We teach a kid that he should not touch a hot stove because it will burn his hands, or we give him a box of candies to perform a specific task or behave in a certain way. Skinner used Cumulative recorder to find the effect of certain factors on behavior or response of an organism For example: the rate at which lever was pressed by a monkey to get bananas etc.
Hope it helps!
Viruses<span> are much, much smaller than </span>prokaryotes<span>. </span>Prokaryotic<span> and </span>Eukaryotic cells<span>are both alive, while </span>viruses<span> are not. </span>Viruses<span> have very few organelles, similar to the</span>prokaryotic cells<span>. They contain a plasma membrane, </span>cell<span> wall, RNA or DNA, and a protein capsule.</span>
Answer:
B) You measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same.
Explanation:
In the above scenario, we are using the control gene and we should know about the control gene is that its expression is either at transcription level or at translation level. For this situation we should examine the pre-mRNA stage of control gene in various cells because it is control gene so it should be present in various cells.
So, the best practice is to quantify the pre-mRNA level of gene then we can effectively solve the experimental problem and find the gene expression either it is at transcription or translation level.
