<span>A
gradual change in phenotype over a geographical area is called a cline (or clinal variation).</span>
A
cline is gradual phenotypic (and/or genetic) differences over a geographical
area. It usually happens as a result of the change of allele frequencies within
the gene pool.
The brief description of the project is called Abstract.
Option B.
<h3><u>Explanation:</u></h3>
An abstract is defined as a brief description of the project or content of an article, speech, or a book. An abstract is given at the beginning of the book or project to describe what's the topic of the project, what the project is going to prove, or to explain.
An introduction on the other hand is a description about the project topic, the prevailing idea, or explaining the topic of project.
A reference is described as the source from where the data of the project are collected or hints are taken.
A summary is the paragraph briefly describing the project conclusion at the end of the project, to briefly explain everything about the project.
Answer:
a. The initial concentration of the substrate
Explanation:
If the researcher keeps the initial concentration of the substrate constant, it will give room to compare the reaction rates under different environmental conditions. The reaction rates will assist the researcher by providing the researcher with the necessary and important information about the enzyme's function in different environments.
