What vessel returns fluid from the lymphatic system to the circulatory system?
a. thoracic duct
c. lymphatic vein
b. aorta
d. urethra

Asap. this question is 100 points if you answer it question: describe the basic relationship between ocean depth and temperature seen in the graph

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.