Which of the following would make the best index fossil? 1 point
A. An insect that only existed in one small forest for about 100 million years.
B. An aquatic animal that existed all over the world for about 15 million years.
C. A single-celled organism that lived in a widespread region for about 25 million
years.
D. A plant species that lived in a specific geographic region for about 5 million years.

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed

Based on her survey, which advertising mediums will work best to publicize leslie's in-store specials?

What is the next step in muscle contraction after the actin changes shape