A researcher is designing an experiment to see if a new drug will lower the blood pressure of rats. He uses a double blind design and in addition to giving some of the rats the new drug, some others are given vasopressin, a hormone that is known to lower blood pressure. Why include vasopressin

Name the part of the the brain labeled "e".

According to the cladogram, which organisms have roundworms as a common ancestor?

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants