Air circulates in Earth's atmosphere. Which of the following is the fundamental cause of air circulation in Earth's atmosphere?
A. O ocean currents
B. O Earth's gravity
C. o Earth's magnetic field
D. O temperature differences

The body is protected against harmful flu viruses by

The mammal pictured below is a silvery mole rat. which statement is an inference based on the picture? the animal is ugly. the animal has hairless feet with sharp claws. the animal has prominent upper and lower incisor teeth. the animal likely has poor vision since its eyes are so small.

How does the nervous system affect the excretory system?