There are many people opposed to stem cell research based on ethical grounds. this is because the stem cells used are most often taken from human embryos. however, many are still in favor of stem cell research. one of the reasons is a) that stem cells are widely available. b) that stem cells can treat diseases with no other cure. c) that stem cells won't result in negative side effects. d) that stem cell research is the most cost effective treatment.

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons