Dinner's cooking. it smells so good! soon we'll be eating some chicken and dumplings and our digestive system will get to work on the food we eat. what body system to move the food we eat through the digestive system?

How are extrusive rocks formed? magma gets trapped inside earth and cools to rock. volcanoes apply force to solid rocks and eject them. magma gets forced to earth’s surface and cools to rock. volcanoes trap lava inside earth, where it cools to rock.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Each member of a class sampled a piece of ptc testing paper. thirty people sampled the chemical. twenty persons were tasters. how many had heterozygous genes? 10 20 0-20 indeterminate