25 ! this pedigree chart tracks the inheritance of a recessive trait that is not sex-linked. based on the information in the chart, which of the following statements is true about individuals 3 and 4? select one: a. at least one is heterozygous for the trait. b. they are both homozygous dominant for the trait. c. they are both heterozygous for the trait. d. at least one is homozygous for the trait.

In which state was more than 100 billion tons of coal mined in 2005?

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 !

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false