In order to keep all other things the same and isolate the effects of one particular variable in the biology experiment, juanita will want to do which of the following? check all that apply.
avoid drawing conclusions after one trial.
offer the same type of food to the rats in each trial.
make sure all tested rats are the same age.

50pts why can't scientists clone embryos for an unlimited supply of stem cells? culture of life: select the best answer from the choices provided. a. they do not yet have the technology to clone embryos. b. most scientists would never endeavor such a controversial task. c. there are already enough stem cell lines. d. cloning is prohibited by the human cloning prohibition act of 2003.

In at least two paragraphs, discuss the differences between the principles of republicanism and democracy. explain whether you think the united states is more of a republic or a democracy. refer to at least one example from the constitution. (10 points)

1.how is germany's economic system similar to that of the united kingdom a. both are free-market economic b. both are command economic c. both are mixed economic d. both are traditional economic