Select the most correct statement.
a. the immune system is closely associated with the lymphatic system.
b. the endocrine system is not a true structural organ system.
c. organ systems operate independently of each other to maintain life.
d. organ systems can be composed of cells or tissues, but not both.

Using freezing point depression to find molecular weight lab report

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.