Unlike natural selection, genetic drift does not depend on an allele's beneficial or harmful effects. Instead, drift changes allele frequencies purely by chance, as random subsets of individuals (and the gametes of those individuals) are sampled to produce the next generation.
The sandstone arches found in arches national park, utah, are an example of Sedimentary rock. Sandstone is composed of cemented sand grains and is the cliff-forming rock commonly seen in southern Utah. Two famous formations are the Entrada Sandstone seen in Arches National Park, and the Navajo Sandstone (Checkerboard Mesa) in Zion National Park.
Answer:
the pH
Explanation:
The condition that should not be kept the same in each of the five test tubes is the pH.
Since <u>the aim of the experiment is to investigate the effect of pH on the activity of the lipase enzyme</u>, the pH is, therefore, the <em>independent variable</em>. Thus, it must be controlled or varied in all the test tubes in order to see its effect on the activity of the enzyme, which, in this case, would be the dependent variable.
The tympanic membrane is a patch of skin behind a frog's ear that allows it to hear on land and underwater
So basically, it's like an eardrum for a frog
Hope this helps
-Maranda
