Which serves as evidence for a scientific claim?
surveys of public opinion
company advertisements
controlled experiments
personal websites
mark this and return
save and exit

How is the male reproductive system different from other body systems? it isn’t necessary to vital signs. it monitors other body systems, and adjusts if necessary. it transports items from one system to another. it is the only system that produces hormones in the male.

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

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