Which of the following acts as a part of both the nervous and endocrine systems? A. the myelin sheath
B. the hypothalamus
C. the thymus
D. the pancreas

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Name the types of burns one can get and which structures of the integument are damaged

How does deforestation affect the water cycle? a. it increases the amount of runoff b. it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff