Arthropods and many other organisms have an open circulatory system to internally distribute their blood (or hemolymph, as it's technically called). An open circulatory system means that

Which of the following is the most likely result of converting forestland to urban development? a. the amount of land available for lumber production decreases. b. fewer trees are needed because cities are made mainly of concrete. c. people discover more efficient ways to grow trees. d. the price of lumber goes down.

Using the periodic table, determine which material is most likely a good conductor

Nucleic acid certain protein cell membranes certain carbohydrates