Awildlife biologist does a dna gel to determine how closely related four species of trout are to one another. these are the results of the gel electrophoresis. which two species of trout are most closley related?

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

If animal agriculture was eliminated, how much grain would become available for human consumption?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?