18 A population is composed of individual organisms. Which of the following is an example of genetic variation within a population of birds? * 4 points
several organisms with broken wings
individual organisms with broken legs
organisms with different sized beaks
population of identical bird beaks

Johannesburg kepler, an apprentice of brahe, believed in the heliocentric universe but rejected past astronomers belief in

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

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