Two ways in which the evolution of organisms can have a harmful effect on humans

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Scientists are conducting a study on the effectiveness of a new drug on memory loss. they are giving some of the test subjects the new drug to find out if it improves their long-term memory. which are possible limitations of this study? check all that apply. a) test subjects may want to participate in additional experiments. b) test subjects may think they should be paid more. c) test subjects may get bored and want to quit early. d) test subjects may have to travel during the experiment. e) test subjects may have full-time jobs. this is multiple choice. you for the !

Lumps of iron and manganese ore called can be harvested from the seafloor near underwater volcanoes.