Which of the following does the immune system target in rheumatoid arthritis? A. beta cells

B. cartilage

C. synovium

D. gluten

Modern whales developed their traits through natural selection what occurs during the process of natural selection

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Whats one way that rocks do not follow the typical rock cycle pathway?