Please help! Pretty please Which of the following indices would not reflect information relating to ecosystems?
A. Simpson’s diversity index
B. Shannon’s diversity index
C. Species richness
D. Species evenness
E. Species difference

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

When an object is moving away from you while still making a sound, the pitch of the sound is perceived to a. lower b. unchanged c. fluctuating d.higher

Which individual below would be considered heterozygous? a.dd b.dd c.dd