An anthropologist finds a fossil that is 2 million years old, and it had simple tools nearby. To which species could the specimen belong? Australopithecus africanus Australopithecus afarensis Homo habilis Homo erectus

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

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?

Me. henley said, “in the rat race we call life, only the strong will survive.” he may have been referring to