Ilived on a small indonesian island around 18 kya. i used stone tools to hunt animals, but i had a very small cranial capacity (around 400 cc) and a very small body. what fossil species am i?
a. australopithecus
b. afarensis
c. homo habilis
d. homo floresiensis
e. 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

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Diagram of the evolution of land plants?